Az.StackHCI

2.1.2

custom/stackhci.ps1

                                #

# AzureStack HCI Registration and Unregistration Powershell Cmdlets.

#

$ErrorActionPreference = 'Stop'

$GAOSBuildNumber = 17784

$GAOSUBR = 1374

$V2OSBuildNumber = 20348

$V2OSUBR = 288

$22H2BuildNumber = 20349

$23H2BuildNumber = 20350

#region User visible strings

$NoClusterError = "Computer {0} is not part of an Azure Stack HCI cluster. Use the -ComputerName parameter to specify an Azure Stack HCI cluster node and try again."

$CloudResourceDoesNotExist = "The Azure resource with ID {0} doesn't exist. Unregister the cluster using Unregister-AzStackHCI and then try again."

$RegisteredWithDifferentResourceId = "Azure Stack HCI is already registered with Azure resource ID {0}. To register or change registration, first unregister the cluster using Unregister-AzStackHCI, then try again."

$RegistrationInfoNotFound = "Additional parameters are required to unregister. Run 'Get-Help Unregister-AzStackHCI -Full' for more information."

$RegionNotSupported = "Azure Stack HCI is not yet available in region {0}. Please choose one of these regions: {1}."

$CertificateNotFoundOnNode = "Certificate with thumbprint {0} not found on node(s) {1}. Make sure the certificate has been added to the certificate store on every clustered node."

$SettingCertificateFailed = "Failed to register. Couldn't generate self-signed certificate on node(s) {0}. Couldn't set and verify registration certificate on node(s) {1}. Make sure every clustered node is up and has Internet connectivity (at least outbound to Azure)."

$InstallLatestVersionWarning = "Newer version of the Az.StackHCI module is available. Update from version {0} to version {1} using Update-Module."

$NotAllTheNodesInClusterAreGA = "Update the operating system on node(s) {0} to version $GAOSBuildNumber.$GAOSUBR or later to continue."

$NoExistingRegistrationExistsErrorMessage = "Can't repair registration because the cluster isn't registered yet. Register the cluster using Register-AzStackHCI without the -RepairRegistration option."

$HCIResourceGroupNameDifferentErrorMessage = "Cluster resource has already been created in resource group : {0}. Skip '-ResourceGroupName' or provide '-ResourceGroupName' as {0} in Register-AzStackHCI to perform registration."

$HCISubscriptionDifferentErrorMessage = "Cluster is already registered to subscription id : {0}. Skip '-SubscriptionId' or provide '-SubscriptionId' as {0} in Register-AzStackHCI to perform registration."

$HCIResourceNameDifferentErrorMessage = "Cluster is already registered with resource name : {0}. Skip '-ResourceName' or provide '-ResourceName' as {0} in Register-AzStackHCI to perform registration."

$UserCertValidationErrorMessage = "Can't use certificate with thumbprint {0} because it expires in less than 60 days, on {1}. Certificates must be valid for at least 60 days."

$FailedToRemoveRegistrationCertWarning = "Couldn't clean up Azure Stack HCI registration certificate from node(s) {0}. You can ignore this message or clean up the certificate yourself (optional)."

$UnregistrationSuccessDetailsMessage = "Azure Stack HCI is successfully unregistered. The Azure resource representing Azure Stack HCI has been deleted. Azure Stack HCI can't sync with Azure until you register again."

$RegistrationSuccessDetailsMessage = "Azure Stack HCI is successfully registered. An Azure resource representing Azure Stack HCI has been created in your Azure subscription to enable an Azure-consistent monitoring, billing, and support experience."

$CouldNotGetLatestModuleInformationWarning = "Can't connect to the PowerShell Gallery to verify module version. Make sure you have the latest Az.StackHCI module with major version {0}.*."

$ResourceExistsInDifferentRegionError = "There is already an Azure Stack HCI resource with the same resource ID in region {0}, which is different from the input region {1}. Either specify the same region or delete the existing resource and try again."

$ArcCmdletsNotAvailableError = "Azure Arc integration isn't available for the version of Azure Stack HCI installed on node(s) {0} yet. Check the documentation for details. You may need to install an update or join the Preview channel."

$ArcRegistrationDisableInProgressError = "Unregister of Azure Arc integration is in progress. Try Unregister-AzStackHCI to finish unregistration and then try Register-AzStackHCI again."

$ArcAADAppCreationMessage= "Creating AAD application for onboarding ARC"

$FetchingRegistrationState = "Checking whether the cluster is already registered"

$DisablingDefaultExtensions = "Disabling Azure Arc for servers Mandatory extensions"

$CheckingDependentModules = "Checking whether the required modules are installed"

$ValidatingParametersFetchClusterName = "Validating cmdlet parameters"

$ValidatingParametersRegisteredInfo = "Validating the parameters and checking registration information"

$RegisterProgressActivityName = "Registering Azure Stack HCI with Azure..."

$UnregisterProgressActivityName = "Unregistering Azure Stack HCI from Azure..."

$InstallAzResourcesMessage = "Installing required PowerShell module: Az.Resources"

$InstallRSATClusteringMessage = "Installing required Windows feature: RSAT-Clustering-PowerShell"

$LoggingInToAzureMessage = "Logging in to Azure"

$RegisterAzureStackRPMessage = "Registering Microsoft.AzureStackHCI provider to Subscription"

$CreatingResourceGroupMessage = "Creating Azure Resource Group {0}"

$CreatingCloudResourceMessage = "Creating Azure Resource {0} representing Azure Stack HCI by calling Microsoft.AzureStackHCI provider"

$RepairingCloudResourceMessage = "Repairing Azure Resource {0} representing Azure Stack HCI by calling Microsoft.AzureStackHCI provider"

$GettingCertificateMessage = "Getting new certificate from on-premises cluster to use as application credential"

$AddAppCredentialMessage = "Adding certificate as application credential for the Azure AD application {0}"

$DefaultExtensionPromptMessage = "Registering your system will automatically setup Azure Arc-enabled servers and install Mandatory Azure Arc extensions that help improve product quality and make it easier to get remote support. Learn more at aka.ms/azurestackhcimandatoryextensions."

$RegisterAndSyncMetadataMessage = "Registering Azure Stack HCI cluster and syncing cluster census information from the on-premises cluster to the cloud"

$UnregisterHCIUsageMessage = "Unregistering Azure Stack HCI cluster and cleaning up registration state on the on-premises cluster"

$DeletingCloudResourceMessage = "Deleting Azure resource with ID {0} representing the Azure Stack HCI cluster"

$DeletingArcCloudResourceMessage = "Deleting Azure resource with ID {0} representing the Azure Stack HCI cluster Arc integration"

$DeletingExtensionMessage = "Deleting extension {0} on cluster {1}"

$RegisterArcMessage = "Arc for servers registration triggered"

$UnregisterArcMessage = "Arc for servers unregistration triggered"

$ArcMachineAlreadyExistsInResourceGroupError = "Arc machine(s) with names: {0} already exists in the Resource Group {1}. Use a different Resource group for registration or specify a different Arc for Servers Resource Group."

$SetAzureStackHCIRegistrationErrorMessage = "Exception occurred in Set-AzureStackHCIRegistration. ErrorMessage: {0}"

$ArcAlreadyRegisteredInDifferentResourceGroupError = "Arc servers are already registered in Resource Group: {0}. To change resource groups, please unregister and register again"

$ClusterCreationFailureMessage = "Failed to create cluster resource"

$rpObjectIdNullError = "Resource Provider Object Id is Null. Failed to assign roles to HCI RP for ARC Onboarding"

$roleAssignmentHCIRPFailError = "Failed to assign Arc roles to HCI Resource Provider"

$DefaultExtensionErrorMessage = "User has declined to install Mandatory Azure Arc extensions. Registration is not possible without a consent to install Mandatory extensions. Aborting registration."

$RegisterArcProgressActivityName = "Registering Azure Stack HCI with Azure Arc..."

$UnregisterArcProgressActivityName = "Unregistering Azure Stack HCI with Azure Arc..."

$RegisterArcRPMessage = "Registering Microsoft.HybridCompute and Microsoft.GuestConfiguration resource providers to subscription"

$SetupArcMessage = "Initializing Azure Stack HCI integration with Azure Arc"

$StartingArcAgentMessage = "Enabling Azure Arc integration on every clustered node"

$VerifyingArcMessage = "Verifying Azure Arc for Servers registration"

$WaitingUnregisterMessage = "Disabling Azure Arc integration on every clustered node"

$CleanArcMessage = "Cleaning up Azure Arc integration"

$MissingDependentModulesError = "Can't find PowerShell module(s): {0}. Please install the missing module(s) using 'Install-Module -Name <Module_Name>' and try again."

$ArcAlreadyEnabledInADifferentResourceError = "Below mentioned cluster node(s) are already Arc enabled with a different ARM Resource Id:`n{0}`nDisconnect Arc agent on these nodes and run Register-AzStackHCI again."

$ArcAgentRolesInsufficientPreviligeMessage = "Failed to assign required roles for Azure Arc integration. Your Azure AD account must be an Owner or User Access Administrator in the subscription to enable Azure Arc integration."

$RegisterArcFailedErrorMessage = "Some clustered nodes couldn't be Arc-enabled right now. Check the Arc Scheduled Task logs to investigate further. These logs can be found at C:\Windows\Tasks\ArcForServers."

$RegisterArcFailedExceptionMessage = "Failed to enable Arc on some clustered nodes."

$ArcSettingsPatchFailedWarningMessage = "Arc for Servers registration failed. Visit https://learn.microsoft.com/en-us/azure-stack/hci/deploy/troubleshoot-hci-registration#registration-completes-successfully-but-azure-arc-connection-in-portal-says-not-installed and follow the troubleshooting steps. If Azure-Arc registration continues failing for more than 12 hours, contact support."

$ArcSettingsPatchFailedLogMessage = "Arc for Servers registration failed. Unable to find the cluster nodes in Arc Settings resource."

$UnregisterArcFailedError = "Couldn't disable Azure Arc integration on Node {0}. Try running Disable-AzureStackHCIArcIntegration Cmdlet on the node. If the node is in a state where Disable-AzureStackHCIArcIntegration Cmdlet could not be run, remove the node from the cluster and try Unregister-AzStackHCI Cmdlet again."

$ArcExtensionCleanupFailedError = "Couldn't delete Arc extension {0} on cluster nodes. You can try the extension uninstallation steps listed at https://docs.microsoft.com/en-us/azure/azure-arc/servers/manage-agent for removing the extension and try Unregister-AzStackHCI again. If the node is in a state where extension uninstallation could not succeed, try Unregister-AzStackHCI with -Force switch."

$ArcExtensionCleanupFailedWarning = "Couldn't delete Arc extension {0} on cluster nodes. Extension may continue to run even after unregistration."

$SetProgressActivityName = "Setting properties for the Azure Stack HCI resource in Azure..."

$SetProgressStatusGathering = "Gathering information"

$SetProgressStatusGetAzureResource = "Getting the Azure Stack HCI resource"

$SetProgressStatusOpSwitching = "Switching to the subscription ID {0}"

$SetProgressStatusUpdatingProps = "Updating the resource properties"

$SetProgressStatusSyncCluster = "Syncing the Azure Stack HCI cluster with Azure"

$SetAzResourceClusterNotRegistered = "The cluster is not registered with Azure. Register the cluster using Register-AzStackHCI and then try again."

$SetAzResourceClusterNodesDown = "One or more servers in your cluster are offline. Check that all your servers are up and then try again."

$SetAzResourceSuccessWSSE = "Successfully enabled Windows Server Subscription."

$SetAzResourceSuccessWSSD = "Successfully disabled Windows Server Subscription."

$SetAzResourceSuccessDiagLevel = "Successfully configured the Azure Stack HCI diagnostic level to {0}."

$SetProgressShouldProcess = "Update the resource properties to change Windows Server Subscription or Azure Stack HCI diagnostic level"

$SetProgressShouldContinue = "This will enable or disable billing for Windows Server guest licenses through your Azure subscription."

$SetProgressShouldContinueCaption = "Configure Windows Server Subscription"

$SetProgressWarningDiagnosticOff = "Setting diagnostic level to Off will prevent Microsoft from collecting important diagnostic information that helps improve Azure Stack HCI."

$SetProgressWarningWSSD = "Windows Server Subscription will no longer activate your Windows Server VMs. Please check that your VMs are being activated another way."

$SecondaryProgressBarId = 2

$EnableAzsHciImdsActivity = "Enable Azure Stack HCI IMDS Attestation..."

$ConfirmEnableImds = "Enabling IMDS Attestation configures your cluster to use workloads that are exclusively available on Azure."

$ConfirmDisableImds = "Disabling IMDS Attestation will remove the ability for some exclusive Azure workloads to function."

$ImdsClusterNotRegistered = "The cluster is not registered with Azure. Register the cluster using Register-AzStackHCI and then try again."

$DisableAzsHciImdsActivity = "Disable Azure Stack HCI IMDS Attestation..."

$AddAzsHciImdsActivity = "Add Virtual Machines to Azure Stack HCI IMDS Attestation..."

$RemoveAzsHciImdsActivity = "Remove Virtual Machines from Azure Stack HCI IMDS Attestation..."

$ShouldContinueHyperVInstall = "The Hyper-V Powershell management tools are required to be installed on {0} to continue. Install RSAT-Hyper-V-Tools and continue?"

$DiscoveringClusterNodes = "Discovering cluster nodes..."

$AllClusterNodesAreNotOnline = "One or more servers in your cluster are offline. Check that all your servers are up and then try again."

$CheckingClusterNode = "Checking AzureStack HCI IMDS Attestation on {0}"

$ConfiguringClusterNode = "Configuring AzureStack HCI IMDS Attestation on {0}"

$DisablingIMDSOnNode = "Disabling AzureStack HCI IMDS Attestation on {0}"

$RemovingVmImdsFromNode = "Removing AzureStack HCI IMDS Attestation from guests on {0}"

$AttestationNotEnabled = "The IMDS Service on {0} needs to be activated. This is required before guests can be configured. Run Enable-AzStackHCIAttestation cmdlet."

$ErrorAddingAllVMs = "Did not add all guests. Try running Add-AzStackHCIVMAttestation on each node manually."

$MaskString = "XXXXXXX"

$SetupCloudManagementActivityName = "Cloud Management configuration..."

$ConfiguringCloudManagementMessage = "Configuring Cloud Management agent."

$ConfiguringCloudManagementClusterSvc = "Creating Cloud Management cluster resource."

$StartingCloudManagementMessage = "Starting Cloud Management agent."

$RemoteSupportConsentText = "`r`n`r`nBy approving this request, the Microsoft support organization or the Azure engineering team supporting this feature ('Microsoft Support Engineer') will be given direct access to your device for troubleshooting purposes and/or resolving the technical issue described in the Microsoft support case. `r`n`r`nDuring a remote support session, a Microsoft Support Engineer may need to collect logs. By enabling remote support, you have agreed to a diagnostic logs collection by Microsoft Support Engineer to address a support case You also acknowledge and consent to the upload and retention of those logs in an Azure storage account managed and controlled by Microsoft. These logs may be accessed by Microsoft in the context of a support case and to improve the health of Azure Stack HCI. `r`n`r`nThe data will be used only to troubleshoot failures that are subject to a support ticket, and will not be used for marketing, advertising, or any other commercial purposes without your consent. The data may be retained for up to ninety (90) days and will be handled following our standard privacy practices (https://privacy.microsoft.com/en-US/). Any data previously collected with your consent will not be affected by the revocation of your permission."

$AlreadyLoggedFlag = "Already Logged"

#endregion

#region Constants

$UsageServiceFirstPartyAppId = "1322e676-dee7-41ee-a874-ac923822781c"

$MicrosoftTenantId = "72f988bf-86f1-41af-91ab-2d7cd011db47"

$MSPortalDomain = "https://ms.portal.azure.com/"

$AzureCloudPortalDomain = "https://portal.azure.com/"

$AzureChinaCloudPortalDomain = "https://portal.azure.cn/"

$AzureUSGovernmentPortalDomain = "https://portal.azure.us/"

$AzureGermanCloudPortalDomain = "https://portal.microsoftazure.de/"

$AzurePPEPortalDomain = "https://df.onecloud.azure-test.net/"

$AzureCanaryPortalDomain = "https://portal.azure.com/"

$AzureCloud = "AzureCloud"

$AzureChinaCloud = "AzureChinaCloud"

$AzureUSGovernment = "AzureUSGovernment"

$AzureGermanCloud = "AzureGermanCloud"

$AzurePPE = "AzurePPE"

$AzureCanary = "AzureCanary"

$PortalCanarySuffix = '?feature.armendpointprefix={0}'

$PortalHCIResourceUrl = '#@{0}/resource/subscriptions/{1}/resourceGroups/{2}/providers/Microsoft.AzureStackHCI/clusters/{3}/overview'

$Region_EASTUSEUAP = 'eastus2euap'

[hashtable] $ServiceEndpointsAzureCloud = @{

        $Region_EASTUSEUAP = 'https://canary.dp.stackhci.azure.com'

        }

$ServiceEndpointAzureCloudFrontDoor = "https://dp.stackhci.azure.com"

$ServiceEndpointAzureCloud = $ServiceEndpointAzureCloudFrontDoor

$AuthorityAzureCloud = "https://login.microsoftonline.com"

$BillingServiceApiScopeAzureCloud = "https://azurestackhci-usage.trafficmanager.net/.default"

$GraphServiceApiScopeAzureCloud = "https://graph.microsoft.com/.default"

$ServiceEndpointAzurePPE = "https://azurestackhci-df.azurefd.net"

$AuthorityAzurePPE = "https://login.windows-ppe.net"

$BillingServiceApiScopeAzurePPE = "https://azurestackhci-usage-df.azurewebsites.net/.default"

$GraphServiceApiScopeAzurePPE = "https://graph.ppe.windows.net/.default"

$ServiceEndpointAzureChinaCloud = "https://dp.stackhci.azure.cn"

$AuthorityAzureChinaCloud = "https://login.partner.microsoftonline.cn"

$BillingServiceApiScopeAzureChinaCloud = "$UsageServiceFirstPartyAppId/.default"

$GraphServiceApiScopeAzureChinaCloud = "https://microsoftgraph.chinacloudapi.cn/.default"

$ServiceEndpointAzureUSGovernment = "https://dp.azurestackhci.azure.us"

$AuthorityAzureUSGovernment = "https://login.microsoftonline.us"

$BillingServiceApiScopeAzureUSGovernment = "https://dp.azurestackhci.azure.us/.default"

$GraphServiceApiScopeAzureUSGovernment = "https://graph.microsoft.us/.default"

$ServiceEndpointAzureGermanCloud = "https://azurestackhci-usage.trafficmanager.de"

$AuthorityAzureGermanCloud = "https://login.microsoftonline.de"

$BillingServiceApiScopeAzureGermanCloud = "https://azurestackhci-usage.azurewebsites.de/.default"

$GraphServiceApiScopeAzureGermanCloud = "https://graph.cloudapi.de/.default"

$RPAPIVersion = "2022-12-01";

$HCIArcAPIVersion = "2023-03-01"

$HCIArcExtensionAPIVersion = "2021-09-01"

$HCApiVersion = "2022-03-10"

$HCIArcInstanceName = "/arcSettings/default"

$HCIArcExtensions = "/Extensions"

$OutputPropertyResult = "Result"

$OutputPropertyResourceId = "AzureResourceId"

$OutputPropertyPortalResourceURL = "AzurePortalResourceURL"

$OutputPropertyDetails = "Details"

$OutputPropertyTest = "Test"

$OutputPropertyEndpointTested = "EndpointTested"

$OutputPropertyIsRequired = "IsRequired"

$OutputPropertyFailedNodes = "FailedNodes"

$OutputPropertyErrorDetail = "ErrorDetail"

$OutputPropertyClusterAgentStatus = "ClusterAgentStatus"

$OutputPropertyClusterAgentError = "ClusterAgentError"

$ConnectionTestToAzureHCIServiceName = "Connect to Azure Stack HCI Service"

$ResourceGroupCreatedByName = "CreatedBy"

$ResourceGroupCreatedByValue = "4C02703C-F5D0-44B0-ADC3-4ED5C2839E61"

$HealthEndpointPath = "/health"

$MainProgressBarId = 1

$ArcProgressBarId = 2

$AzureConnectedMachineOnboardingRole = "Azure Connected Machine Onboarding"

$AzureConnectedMachineResourceAdministratorRole = "Azure Connected Machine Resource Administrator"

$ArcOnboardingRole = "Azure Connected Machine Resource Manager"

$ArcRegistrationTaskName = "ArcRegistrationTask"

$LogFileDir = '\Tasks\ArcForServers'

$ArcMachineResourceType = "Microsoft.HybridCompute/machines"

$ClusterScheduledTaskWaitTimeMinutes = 15

$ClusterScheduledTaskSleepTimeSeconds = 3

$ClusterScheduledTaskRunningState = "Running"

$ClusterScheduledTaskReadyState = "Ready"

$GetArcSettingsWaitTimeMinutes = 1

$GetArcSettingsSleepTimeSeconds = 15

$ArcSettingsVerificationLimit = 5

$ArcSettingsDisableInProgressState = "DisableInProgress"

# Cluster Agent Service Names

$ClusterAgentServiceName = "HciClusterAgentSvc"

$CloudManagementInfraServiceName = "AszCloudMgmtSvc"

$ClusterAgentGroupName = "Cloud Management"

$AzAccountsModuleMinVersion="2.11.2"

$AzResourcesModuleMinVersion="6.2.0"

Function Write-Log {

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

    [CmdletBinding()]

    Param(

    [Parameter(Mandatory=$False)]

    [ValidateSet("INFO","WARN","ERROR","FATAL","DEBUG")]

    [String]

    $Level = "INFO",

    [Parameter(Mandatory=$True)]

    [string]

    $Message

    )

    $Stamp = (Get-Date).toString("yyyy/MM/dd HH:mm:ss")

    $Line = "$Stamp , $Level , $Message"

    Add-Content $global:LogFileName -Value $Line

}

Function Write-VerboseLog{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

    [CmdletBinding()]

    param(

    [Parameter(Mandatory=$True)]

    [string]

    $Message

    )

    Write-Verbose $Message

    Write-Log -Level "DEBUG" -Message $Message

}

Function Write-InfoLog{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

    [CmdletBinding()]

    param(

    [Parameter(Mandatory=$True)]

    [string]

    $Message

    )

    Write-Information $Message

    Write-Log -Level "INFO" -Message $Message

}

Function Write-WarnLog{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

    [CmdletBinding()]

    param(

    [Parameter(Mandatory=$True)]

    [string]

    $Message

    )

    Write-Warning $Message

    Write-Log -Level "WARN" -Message $Message

}

<#

Writes the Error output to registration log file and console

If Category is passed as 'OperationStopped', the Script will not write the error message again in the final catch block

#>

Function Write-ErrorLog{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

    [CmdletBinding()]

    param(

    [Parameter(Mandatory=$true)]

    [string]

    $Message,

    [Parameter(Mandatory=$false)]

    [System.Management.Automation.ErrorRecord]

    $Exception,

    [Parameter(Mandatory=$false)]

    [string]

    $Category

    )

    $ErrorLogMessage = $PSBoundParameters["Message"]

    $WriteErrorMessage = $PSBoundParameters["Message"]

    if($PSBoundParameters["Exception"])

    {

        $exceptionFormatted = $Exception | Format-List * -Force | Out-String

        $invocationInfoFormatted = $Exception.InvocationInfo | Format-List * -Force | Out-String

        $innerExceptionFormatted = ""

        $_.Exception.InnerException | ForEach-Object {

            $innerExceptionFormatted = $innerExceptionFormatted + ($_ | Format-List * -Force | Out-String)

        } | Out-Null

        $ErrorLogMessage = $ErrorLogMessage + ("`n{0}`n{1}`n{2}" -f $exceptionFormatted, $invocationInfoFormatted, $innerExceptionFormatted)

        $WriteErrorMessage = $WriteErrorMessage + "`n{0}" -f $exceptionFormatted

    }

    # Writing error message in the log file

    Write-Log -Level "ERROR" -Message $ErrorLogMessage

    if($PSBoundParameters["Category"])

    {

        $WriteErrorMessage = $WriteErrorMessage + "`nCategoryInfo: {0}" -f $Category.ToString()

    }

    # Writing error message on the console

    $Host.UI.WriteErrorLine($WriteErrorMessage)

    # If Category is 'OperationStopped', add 'Already Logged' flag in the $Error variable to prevent logging exception again in the final catch block

    if($PSBoundParameters["Category"] -eq "OperationStopped")

    {

        $Error.Add($AlreadyLoggedFlag) | Out-Null

    }

}

Function Write-NodeEventLog{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

    [CmdletBinding()]

    param(

    [Parameter(Mandatory=$True)]

    [string]

    $Message,

    [Parameter(Mandatory=$True)]

    [Int]

    $EventID,

    [Parameter(Mandatory=$True)]

    [bool]

    $IsManagementNode,

    [Parameter(Mandatory=$False)]

    [string]

    $ComputerName,

    [Parameter(Mandatory=$False)]

    [System.Management.Automation.PSCredential]

    $Credentials,

    [Parameter(Mandatory=$False)]

    [EventLogLevel]

    $Level = [EventLogLevel]::Information

    )

    $sourceName="HCI Registration"

    try

    {

        if($IsManagementNode)

        {

            Write-VerboseLog ("Connecting from management node")

            if($Null -eq $Credentials)

            {

                $session = New-PSSession -ComputerName $ComputerName

            }

            else

            {

                $session = New-PSSession -ComputerName $ComputerName -Credential $Credentials

            }

        }

        else

        {

            $session = New-PSSession -ComputerName localhost

        }

        $sourceExists = Invoke-Command -Session $session -ScriptBlock {Get-EventLog -LogName Application -Source $using:sourceName -Newest 1 -ErrorAction SilentlyContinue }

        if(-not $sourceExists)

        {

            Invoke-Command -Session $session -ScriptBlock { New-EventLog -LogName Application -Source $using:sourceName -ErrorAction SilentlyContinue}

        }    

        $levelStr = $Level.ToString()

        Invoke-Command -Session $session -ScriptBlock { Write-EventLog -LogName Application -Source $using:sourceName -EventId $using:EventID -EntryType $using:levelStr -Message $using:Message }

    }

    catch

    {

        Write-WarnLog("failed to write events to node"+ $_.Exception.Message)   

    }

}

Function Print-FunctionParameters{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

    [CmdletBinding()]

    param(

    [Parameter(Mandatory=$True)]

    [string]

    $Message,

    [Parameter(Mandatory=$True)]

    [hashtable]

    $Parameters

    )

    $body = @{}

    foreach ($param in $Parameters.GetEnumerator()) {

        # remove common parameters (Debug, Verbose, etc)

        if ([System.Management.Automation.PSCmdlet]::CommonParameters -contains $param.key) {

            continue

        } 

        if ($param.key -in @("ArmAccessToken","ArcSpnCredential","Credential","AccountId","GraphAccessToken","AccessToken")) 

        {

            $body.add($param.Key, $MaskString) 

        }

        else

        {

            $body.add($param.Key, $param.Value)

        }

    }    

    return "Parameters for {0} are: {1}" -f $Message, ($body | Out-String ) 

}

$CheckNodeArcRegistrationStateScriptBlock = {

    if(Test-Path -Path "C:\Program Files\AzureConnectedMachineAgent\azcmagent.exe")

    {

        $arcAgentStatus = Invoke-Expression -Command "& 'C:\Program Files\AzureConnectedMachineAgent\azcmagent.exe' show -j"

        # Parsing the status received from Arc agent

        $arcAgentStatusParsed = $arcAgentStatus | ConvertFrom-Json

        # Throw an error if the node is Arc enabled to a different resource group or subscription id

        # Agent can be is "Connected"  or disconnected state. If the resource name property on the agent is empty, that means, it is cleanly disconnected , and just the exe exists

        # If the resourceName exists and agent is in "Disconnected" state, indicates agent has temporary connectivity issues to the cloud

        if(-not ([string]::IsNullOrEmpty($arcAgentStatusParsed.resourceName)) -And (($arcAgentStatusParsed.subscriptionId -ne $Using:SubscriptionId) -or ($arcAgentStatusParsed.resourceGroup -ne $Using:ArcResourceGroupName)))

        {

            $differentResourceExceptionMessage = "{0}:  Subscription Id: {1}, Resource Group: {2}" -f $Using:clusterNode, $arcAgentStatusParsed.subscriptionId, $arcAgentStatusParsed.resourceGroup

            throw $differentResourceExceptionMessage

        }

    }

}

$registerArcScript = {

    try

    {

        # Params for Enable-AzureStackHCIArcIntegration 

        $AgentInstaller_WebLink                  = 'https://aka.ms/AzureConnectedMachineAgent'

        $AgentInstaller_Name                     =  $env:windir + '\Tasks\ArcForServers' + '\AzureConnectedMachineAgent.msi'

        $AgentInstaller_LogFile                  =  $env:windir + '\Tasks\ArcForServers' +'\ConnectedMachineAgentInstallationLog.txt'

        $AgentExecutable_Path                    =  $Env:Programfiles + '\AzureConnectedMachineAgent\azcmagent.exe'

        $DebugPreference = 'Continue'

        # Setup Directory.

        $LogFileDir = $env:windir + '\Tasks\ArcForServers'

        if (-Not $(Test-Path $LogFileDir))

        {

            New-Item -Type Directory -Path $LogFileDir

        }

        # Delete log files older than 15 days

        Get-ChildItem -Path $LogFileDir -Recurse | Where-Object {($_.LastWriteTime -lt (Get-Date).AddDays(-15))} | Remove-Item

        # Setup Log file name.

        $date = Get-Date

        $datestring = '{0}{1:d2}{2:d2}' -f $date.year,$date.month,$date.day

        $LogFileName = $LogFileDir + '\RegisterArc_' + $datestring + '.log'

        Start-Transcript -LiteralPath $LogFileName -Append | Out-Null

        $sourceExists = Get-EventLog -LogName Application -Source 'HCI Registration' -Newest 1 -ErrorAction SilentlyContinue

        if(-not $sourceExists)

        {

            New-EventLog -LogName Application -Source 'HCI Registration' -ErrorAction SilentlyContinue

        }

        Write-Information 'Triggering Arc For Servers registration cmdlet'

        $arcStatus = Get-AzureStackHCIArcIntegration

        $enableAzureStackHCIArcIntegrationRetrySleepTimeSeconds = 10

        if ($arcStatus.ClusterArcStatus -eq 'Enabled')

        {

            $nodeStatus = $arcStatus.NodesArcStatus

            if ($nodeStatus.Keys -icontains ($env:computername))

            {

                if ($nodeStatus[$env:computername.ToLowerInvariant()] -ne 'Enabled')

                {

                    Write-Information 'Registering Arc for servers.'

                    Write-EventLog -LogName Application -Source 'HCI Registration' -EventId 9002 -EntryType 'Information' -Message 'Initiating Arc For Servers registration'

                    $enableAzureStackHCIArcIntegrationRetryCount = 10

                    $currentCount = 1

                    $isEnableArcIntegrationSuccessful = $false

                    while (($currentCount -le $enableAzureStackHCIArcIntegrationRetryCount) -and (-Not $isEnableArcIntegrationSuccessful)) 

                    {

                        Write-Information 'Enabling Arc for Servers using Arc SPN Credential'

                        Enable-AzureStackHCIArcIntegration -AgentInstallerWebLink $AgentInstaller_WebLink -AgentInstallerName $AgentInstaller_Name -AgentInstallerLogFile $AgentInstaller_LogFile -AgentExecutablePath $AgentExecutable_Path  *>&1 | Tee-Object -Variable enableArcIntegrationOutput

                        $isEnableArcIntegrationSuccessful = $true

                        if($enableArcIntegrationOutput -ne $null)

                        {

                            $enableArcIntegrationOutput | foreach {

                                Write-Information $_.ToString()

                                if($_.ToString().Contains('401') -or $_.ToString().Contains('403'))

                                {

                                    $isEnableArcIntegrationSuccessful = $false

                                }

                            }

                        }

                        if(($isEnableArcIntegrationSuccessful -eq $false) -and ($currentCount -le $EnableAzureStackHCIArcIntegrationRetryCount))

                        {

                            Write-Information 'Failed to enable Azure Arc integration. Trying it again.'

                            Start-Sleep -Seconds $enableAzureStackHCIArcIntegrationRetrySleepTimeSeconds

                        }

                        $currentCount++

                    }

                    if(-Not $isEnableArcIntegrationSuccessful)

                    {

                        Write-EventLog -LogName Application -Source 'HCI Registration' -EventId 9006 -EntryType 'Information' -Message 'Failed to enable Azure Arc integration.'

                        Write-Information 'Failed to enable Azure Arc integration.'

                        throw 'Failed to enable Azure Arc integration.'

                    }

                    Sync-AzureStackHCI

                    Write-Information 'Completed Arc for Servers registration'

                    Write-EventLog -LogName Application -Source 'HCI Registration' -EventId 9003 -EntryType 'Information' -Message 'Completed Arc For Servers registration'

                }

                else

                {

                    Write-Information 'Node is already registered.'

                }

            }

            else

            {

                # New node added case.

                Write-Information 'Registering Arc for servers.'

                Write-EventLog -LogName Application -Source 'HCI Registration' -EventId 9002 -EntryType 'Information' -Message 'Initiating Arc For Servers registration'

                Enable-AzureStackHCIArcIntegration -AgentInstallerWebLink $AgentInstaller_WebLink -AgentInstallerName $AgentInstaller_Name -AgentInstallerLogFile $AgentInstaller_LogFile -AgentExecutablePath $AgentExecutable_Path

                Sync-AzureStackHCI

                Write-EventLog -LogName Application -Source 'HCI Registration' -EventId 9003 -EntryType 'Information' -Message 'Completed Arc For Servers registration'

            }

        }

        else

        {

            Write-Information ('Cluster Arc status is not enabled. ClusterArcStatus:' + $arcStatus.ClusterArcStatus.ToString())

        }

    }

    catch

    {

        # Get script line number, offset and Command that resulted in exception. Write-ErrorLog with the exception above does not write this info.

        $positionMessage = $_.InvocationInfo.PositionMessage

        Write-EventLog -LogName Application -Source 'HCI Registration' -EventId 9116 -EntryType 'Warning' -Message ('Failed Arc For Servers registration: '+ $positionMessage)

        Write-Error -Message ('Exception occurred in RegisterArcScript : {0}' -f $positionMessage.ToString()) -Exception $_.Exception -Category OperationStopped

    }

    finally

    {

        $customImdsScript = { try{ $customImdsRegKey = Get-Item 'HKLM:\Software\Microsoft\Windows Azure\CurrentVersion\IMDS' -ErrorAction Stop } catch{ $customImdsRegKey = New-Item 'HKLM:\Software\Microsoft\Windows Azure\CurrentVersion\IMDS' -Force -ErrorAction Stop } $customImdsRegKey | New-ItemProperty -Name 'CustomIMDSHostAddress' -Value 'http://127.0.0.1:42542' -Force -ErrorAction Stop | Out-Null }

        try 

        {

            Write-Verbose ('Configuring CustomIMDSHostAddress')

            Invoke-Command -ScriptBlock $customImdsScript 

        } 

        catch 

        {

            Write-Verbose ('Exception occurred while setting custom IMDS host. ErrorMessage : ' + $_.Exception.Message)

            Write-Verbose ($_ | Out-String)

            Write-Warning ('Could not configure CustomIMDSHostAddress for node.')

        }

        try{ Stop-Transcript } catch {}

    }

}

#endregion

$global:LogFileName

function Setup-Logging{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

param(

    [string] $LogFilePrefix,

    [bool] $DebugEnabled

    )

    $date = Get-Date

    $datestring = "{0}{1:d2}{2:d2}-{3:d2}{4:d2}" -f $date.year,$date.month,$date.day,$date.hour,$date.minute

    $global:LogFileName = $LogFilePrefix + "_" + $datestring + ".log"

    if ($DebugEnabled)

    {

        $DebugLogFileName = $LogFilePrefix + "_" + "debug"+ "_" +$datestring + ".log"

        Start-Transcript -LiteralPath $DebugLogFileName -Append | Out-Null

    }

}

function Show-LatestModuleVersion{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

    param()

    try 

    {

        $latestModule = Find-Module -Name Az.StackHCI -ErrorAction Ignore

    }

    catch 

    {

        Write-VerboseLog $_.Exception.Message

        $latestModule = $Null

    }

    if($Null -eq $latestModule)

    {

        $CouldNotGetLatestModuleInformationWarningMsg = $CouldNotGetLatestModuleInformationWarning -f $installedModule.Version.Major

        Write-WarnLog ($CouldNotGetLatestModuleInformationWarningMsg)

    }

    else

    {

        $installedModule = Get-Module -Name Az.StackHCI | Sort-Object  -Property Version -Descending | Select-Object -First 1

        if($latestModule.Version.GetType() -eq [string])

        {

            $latestModuleVersion = [System.Version]::Parse($latestModule.Version)

        }

        else

        {

            $latestModuleVersion = $latestModule.Version

        }

        if(($latestModuleVersion.Major -eq $installedModule.Version.Major) -and ($latestModuleVersion -gt $installedModule.Version))

        {

            $InstallLatestVersionWarningMsg = $InstallLatestVersionWarning -f $installedModule.Version, $latestModuleVersion

            Write-WarnLog ($InstallLatestVersionWarningMsg)

        }

    }

}

<#

Executes a script while suppresing any progressbar coming from cmdlets in script

Useful while running long running cmdlets (202 pattern) since progressbar from these cmdlets 

do not have useful information

#>

function Execute-Without-ProgressBar{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

    param (

        [parameter(Mandatory=$true)]

        [ValidateNotNullOrEmpty()]

        [scriptblock] $ScriptBlock

        )

        $OriginalPref = $ProgressPreference

        try

        {

            $ProgressPreference = "SilentlyContinue"

            $result = Invoke-Command -ScriptBlock $ScriptBlock

        }

        catch

        {

            Write-ErrorLog -Exception $_ -Message "Exception occured while executing cmd: $ScriptBlock" -ErrorAction Continue  

            throw

        }

        finally

        {

            $ProgressPreference = $OriginalPref

        }

        return $result

}

<#

Executes the given script inside an Invoke-Command. 

Useful for scripts where the error needs to be caught inside the Invoke-Command.

Note: The parameters variable used inside $ScriptBlock should be named $Params or the method won't work as expected

#>

function Run-InvokeCommand {

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

    param (

        [parameter(Mandatory=$true)]

        [scriptblock] $ScriptBlock,

        [parameter(Mandatory=$true)]

        [System.Management.Automation.Runspaces.PSSession] $Session,

        [parameter(Mandatory=$true)]

        [System.Collections.HashTable] $Params

    )

    Invoke-Command -Session $Session -ArgumentList $Params, $ScriptBlock -ScriptBlock {

        param ($Params, $ScriptBlock)

        try {

            Invoke-Expression $ScriptBlock

        }

        catch {

            if($null -ne $_.Exception.InnerException.Detail.Error)

            {

                throw $_.Exception.InnerException.Detail.Error

            }

            throw $_.Exception.Message

        }

    }

}

function Retry-Command {

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

    param (

        [parameter(Mandatory=$true)]

        [ValidateNotNullOrEmpty()]

        [scriptblock] $ScriptBlock,

        [int]  $Attempts                   = 8,

        [int]  $MinWaitTimeInSeconds       = 5,

        [int]  $MaxWaitTimeInSeconds       = 60,

        [int]  $BaseBackoffTimeInSeconds   = 2,

        [bool] $RetryIfNullOutput          = $true

        )

    $attempt = 0

    $completed = $false

    $result = $null

    if($MaxWaitTimeInSeconds -lt $MinWaitTimeInSeconds)

    {

        throw "MaxWaitTimeInSeconds($MaxWaitTimeInSeconds) is less than MinWaitTimeInSeconds($MinWaitTimeInSeconds)"

    }

    while (-not $completed) {

        try

        {

            $attempt = $attempt + 1

            $result = Invoke-Command -ScriptBlock $ScriptBlock

            if($RetryIfNullOutput)

            {

                if($result -ne $null)

                {

                    Write-VerboseLog ("Command [{0}] succeeded. Non null result received." -f $ScriptBlock)

                    $completed = $true

                }

                else

                {

                    throw "Null result received."

                }

            }

            else

            {

                Write-VerboseLog ("Command [{0}] succeeded." -f $ScriptBlock)

                $completed = $true

            }

        }

        catch

        {

            $exception = $_.Exception

            if([int]$exception.ErrorCode -eq [int][system.net.httpstatuscode]::Forbidden)

            {

                Write-VerboseLog ("Command [{0}] failed Authorization. Attempt {1}. Exception: {2}" -f $ScriptBlock, $attempt,$exception.Message)

                throw

            }

            else

            {

                if ($attempt -ge $Attempts)

                {

                    Write-VerboseLog ("Command [{0}] failed the maximum number of {1} attempts. Exception: {2}" -f $ScriptBlock, $attempt,$exception.Message)

                    throw

                }

                else

                {

                    $secondsDelay = $MinWaitTimeInSeconds + [int]([Math]::Pow($BaseBackoffTimeInSeconds,($attempt-1)))

                    if($secondsDelay -gt $MaxWaitTimeInSeconds)

                    {

                        $secondsDelay = $MaxWaitTimeInSeconds

                    }

                    Write-VerboseLog ("Command [{0}] failed. Retrying in {1} seconds. Exception: {2}" -f $ScriptBlock, $secondsDelay,$exception.Message)

                    Start-Sleep $secondsDelay

                }

            }

        }

    }

    return $result

}

function Get-PortalDomain{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

param(

    [string] $TenantId,

    [string] $EnvironmentName,

    [string] $Region

    )

    if($EnvironmentName -eq $AzureCloud -and $TenantId -eq $MicrosoftTenantId)

    {

        return $MSPortalDomain;

    }

    elseif($EnvironmentName -eq $AzureCloud)

    {

        return $AzureCloudPortalDomain;

    }

    elseif($EnvironmentName -eq $AzureChinaCloud)

    {

        return $AzureChinaCloudPortalDomain;

    }

    elseif($EnvironmentName -eq $AzureUSGovernment)

    {

        return $AzureUSGovernmentPortalDomain;

    }

    elseif($EnvironmentName -eq $AzureGermanCloud)

    {

        return $AzureGermanCloudPortalDomain;

    }

    elseif($EnvironmentName -eq $AzurePPE)

    {

        return $AzurePPEPortalDomain;

    }

    elseif($EnvironmentName -eq $AzureCanary)

    {

        $PortalCanarySuffixWithRegion = $PortalCanarySuffix -f $Region

        return ($AzureCanaryPortalDomain + $PortalCanarySuffixWithRegion);

    }

}

function Get-DefaultRegion{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

param(

    [string] $EnvironmentName

    )

    $defaultRegion = "eastus";

    if($EnvironmentName -eq $AzureCloud)

    {

        $defaultRegion = "eastus"

    }

    elseif($EnvironmentName -eq $AzureChinaCloud)

    {

        $defaultRegion = "chinaeast2"

    }

    elseif($EnvironmentName -eq $AzureUSGovernment)

    {

        $defaultRegion = "usgovvirginia"

    }

    elseif($EnvironmentName -eq $AzureGermanCloud)

    {

        $defaultRegion = "germanynortheast"

    }

    elseif($EnvironmentName -eq $AzurePPE)

    {

        $defaultRegion = "westus"

    }

    elseif($EnvironmentName -eq $AzureCanary)

    {

        $defaultRegion = "eastus2euap"

    }

    return $defaultRegion

}

function Get-GraphAccessToken{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

param(

    [string] $TenantId,

    [string] $EnvironmentName

    )

    # Below commands ensure there is graph access token in cache

    Get-AzADApplication -DisplayName SomeApp1 -ErrorAction Ignore | Out-Null

    $graphTokenItemResource = (Get-AzContext).Environment.GraphUrl

    $authFactory = [Microsoft.Azure.Commands.Common.Authentication.AzureSession]::Instance.AuthenticationFactory

    $azContext = Get-AzContext

    $graphTokenItem = $authFactory.Authenticate($azContext.Account, $azContext.Environment, $azContext.Tenant.Id, $null, [Microsoft.Azure.Commands.Common.Authentication.ShowDialog]::Never, $null, $graphTokenItemResource)

    return $graphTokenItem.AccessToken

}

function Get-EnvironmentEndpoints{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

param(

    [string] $EnvironmentName,

    [ref] $ServiceEndpoint,

    [ref] $Authority,

    [ref] $BillingServiceApiScope,

    [ref] $GraphServiceApiScope

    )

    if(($EnvironmentName -eq $AzureCloud) -or ($EnvironmentName -eq $AzureCanary))

    {

        $ServiceEndpoint.Value = $ServiceEndpointAzureCloud

        $Authority.Value = $AuthorityAzureCloud

        $BillingServiceApiScope.Value = $BillingServiceApiScopeAzureCloud

        $GraphServiceApiScope.Value = $GraphServiceApiScopeAzureCloud

    }

    elseif($EnvironmentName -eq $AzureChinaCloud)

    {

        $ServiceEndpoint.Value = $ServiceEndpointAzureChinaCloud

        $Authority.Value = $AuthorityAzureChinaCloud

        $BillingServiceApiScope.Value = $BillingServiceApiScopeAzureChinaCloud

        $GraphServiceApiScope.Value = $GraphServiceApiScopeAzureChinaCloud

    }

    elseif($EnvironmentName -eq $AzureUSGovernment)

    {

        $ServiceEndpoint.Value = $ServiceEndpointAzureUSGovernment

        $Authority.Value = $AuthorityAzureUSGovernment

        $BillingServiceApiScope.Value = $BillingServiceApiScopeAzureUSGovernment

        $GraphServiceApiScope.Value = $GraphServiceApiScopeAzureUSGovernment

    }

    elseif($EnvironmentName -eq $AzureGermanCloud)

    {

        $ServiceEndpoint.Value = $ServiceEndpointAzureGermanCloud

        $Authority.Value = $AuthorityAzureGermanCloud

        $BillingServiceApiScope.Value = $BillingServiceApiScopeAzureGermanCloud

        $GraphServiceApiScope.Value = $GraphServiceApiScopeAzureGermanCloud

    }

    elseif($EnvironmentName -eq $AzurePPE)

    {

        $ServiceEndpoint.Value = $ServiceEndpointAzurePPE

        $Authority.Value = $AuthorityAzurePPE

        $BillingServiceApiScope.Value = $BillingServiceApiScopeAzurePPE

        $GraphServiceApiScope.Value = $GraphServiceApiScopeAzurePPE

    }

}

function Get-PortalHCIResourcePageUrl{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

param(

    [string] $TenantId,

    [string] $EnvironmentName,

    [string] $SubscriptionId,

    [string] $ResourceGroupName,

    [string] $ResourceName,

    [string] $Region

    )

    $portalBaseUrl = Get-PortalDomain -TenantId $TenantId -EnvironmentName $EnvironmentName -Region $Region

    $portalHCIResourceRelativeUrl = $PortalHCIResourceUrl -f $TenantId, $SubscriptionId, $ResourceGroupName, $ResourceName

    return $portalBaseUrl + $portalHCIResourceRelativeUrl

}

function Get-ResourceId{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

param(

    [string] $ResourceName,

    [string] $SubscriptionId,

    [string] $ResourceGroupName

    )

    return "/Subscriptions/" + $SubscriptionId + "/resourceGroups/" + $ResourceGroupName + "/providers/Microsoft.AzureStackHCI/clusters/" + $ResourceName

}

function Import-DependentModule

{

    param (

        [string] $ModuleName,

        [string] $MinVersion

    )

    $module = Get-Module -Name $ModuleName

    if ((-not $module) -or ($module.Version -lt [System.Version]$MinVersion)) 

    {

        Write-VerboseLog "Required module $ModuleName (minimum version: $MinVersion) is not imported"

        try 

        {

            # Adding this statement to clear all the versions that exist in the current PS session

            Remove-Module -Name $ModuleName -ErrorAction Ignore

            Import-Module -Name $ModuleName -MinimumVersion $MinVersion

        }

        catch

        {

            Write-WarnLog "$_.Exception"

            Write-VerboseLog "Required module $ModuleName (minimum version: $MinVersion) is missing"

            throw ("$ModuleName (minimum version: $MinVersion)")

        }

    }

}

function Check-DependentModules 

{

    param()

    $missingDependentModules = [System.Collections.ArrayList]::new()

    # Checking if Az.Accounts is imported

    try 

    {

        Write-VerboseLog "Importing dependent module Az.Accounts"

        Import-DependentModule -ModuleName "Az.Accounts" -MinVersion $AzAccountsModuleMinVersion

    }

    catch 

    {

        $missingDependentModules.Add($_.Exception.Message) | Out-Null

    }

    # Checking if Az.Resources is imported

    try 

    {

        Write-VerboseLog "Importing dependent module Az.Resources"

        Import-DependentModule -ModuleName "Az.Resources" -MinVersion $AzResourcesModuleMinVersion

    }

    catch 

    {

        $missingDependentModules.Add($_.Exception.Message) | Out-Null

    }

    if($missingDependentModules.Length -gt 0)

    {

        $missingDependentModules = $missingDependentModules -join ", "

        $MissingDependentModulesExceptionMessage = $MissingDependentModulesError -f $missingDependentModules

        throw $MissingDependentModulesExceptionMessage

    }

}

function Azure-Login{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

param(

    [string] $SubscriptionId,

    [string] $TenantId,

    [string] $ArmAccessToken,

    [string] $GraphAccessToken,

    [string] $AccountId,

    [string] $EnvironmentName,

    [string] $ProgressActivityName,

    [string] $Region,

    [bool]   $UseDeviceAuthentication

    )

    Write-Progress -Id $MainProgressBarId -activity $ProgressActivityName -status $InstallAzResourcesMessage -percentcomplete 10

    Write-Progress -Id $MainProgressBarId -activity $ProgressActivityName -status $LoggingInToAzureMessage -percentcomplete 30

    if($EnvironmentName -eq $AzurePPE)

    {

        Write-VerboseLog ("Setting up AzurePPE AzEnvironment")

        Add-AzEnvironment -Name $AzurePPE -PublishSettingsFileUrl "https://windows.azure-test.net/publishsettings/index" -ServiceEndpoint "https://management-preview.core.windows-int.net/" -ManagementPortalUrl "https://windows.azure-test.net/" -ActiveDirectoryEndpoint "https://login.windows-ppe.net/" -ActiveDirectoryServiceEndpointResourceId "https://management.core.windows.net/" -ResourceManagerEndpoint "https://api-dogfood.resources.windows-int.net/" -GalleryEndpoint "https://df.gallery.azure-test.net/" -GraphEndpoint "https://graph.ppe.windows.net/" -GraphAudience "https://graph.ppe.windows.net/" | Out-Null

    }

    $ConnectAzureADEnvironmentName = $EnvironmentName

    $ConnectAzAccountEnvironmentName = $EnvironmentName

    if($EnvironmentName -eq $AzureCanary)

    {

        Write-VerboseLog ("Setting up {0} AzEnvironment" -f $AzureCanary)

        $ConnectAzureADEnvironmentName = $AzureCloud

        if([string]::IsNullOrEmpty($Region))

        {

            $Region = Get-DefaultRegion -EnvironmentName $EnvironmentName

            Write-VerboseLog ("{0} region resolves to {1}" -f $AzureCanary,$Region)

        }

        # Normalize region name

        $Region = Normalize-RegionName -Region $Region

        $ConnectAzAccountEnvironmentName = ($AzureCanary + $Region)

        $azEnv = (Get-AzEnvironment -Name $AzureCloud)

        $azEnv.Name = $ConnectAzAccountEnvironmentName

        $azEnv.ResourceManagerUrl = ('https://{0}.management.azure.com/' -f $Region)

        $azEnv | Add-AzEnvironment -MicrosoftGraphEndpointResourceId "https://graph.microsoft.com" -MicrosoftGraphUrl "https://graph.microsoft.com" | Out-Null

        Write-VerboseLog ("$AzureCanary env details: : {0}" -f ($azEnv | Out-String))

    }

    Disconnect-AzAccount -ErrorAction Ignore | Out-Null

    if([string]::IsNullOrEmpty($ArmAccessToken) -or [string]::IsNullOrEmpty($AccountId))

    {

        # Interactive login

        $IsIEPresent = Test-Path "$env:SystemRoot\System32\ieframe.dll"

        if([string]::IsNullOrEmpty($TenantId))

        {

            Write-VerboseLog ("attempting login without TenantID")

            if(($UseDeviceAuthentication -eq $false) -and ($IsIEPresent))

            {

                $AZConnectParams = @{

                    Environment = $ConnectAzAccountEnvironmentName

                    SubscriptionId = $SubscriptionId

                    Scope = "Process"

                }

            }

            else # Use -UseDeviceAuthentication as IE Frame is not available to show Azure login popup

            {

                Write-Progress -Id $MainProgressBarId -activity $ProgressActivityName -Completed # Hide progress activity as it blocks the console output

                $AZConnectParams = @{

                    Environment = $ConnectAzAccountEnvironmentName

                    SubscriptionId = $SubscriptionId

                    Scope = "Process"

                    UseDeviceAuthentication = $true

                }

            }

        }

        else

        {

            Write-VerboseLog ("Attempting login with TenantID: $TenantId")

            if(($UseDeviceAuthentication -eq $false) -and ($IsIEPresent))

            {

                $AZConnectParams = @{

                    Environment = $ConnectAzAccountEnvironmentName

                    SubscriptionId = $SubscriptionId

                    TenantId = $TenantId

                    Scope = "Process"

                }

            }

            else # Use -UseDeviceAuthentication as IE Frame is not available to show Azure login popup

            {

                Write-Progress -Id $MainProgressBarId -activity $ProgressActivityName -Completed # Hide progress activity as it blocks the console output

                $AZConnectParams = @{

                    Environment = $ConnectAzAccountEnvironmentName

                    SubscriptionId = $SubscriptionId

                    TenantId = $TenantId

                    UseDeviceAuthentication = $true

                    Scope = "Process"

                }

            }

        }

        Write-InfoLog $(Print-FunctionParameters -Message "Connect-AzAccount" -Parameters $AZConnectParams)

        Connect-AzAccount @AZConnectParams | Out-Null

        $azContext = Get-AzContext

        $TenantId = $azContext.Tenant.Id

    }

    else

    {

        Write-VerboseLog ("Non-interactive Login")

        if([string]::IsNullOrEmpty($TenantId))

        {

            Write-VerboseLog ("attempting login without TenantID")

            if(-not [string]::IsNullOrEmpty($GraphAccessToken))

            {

                Write-VerboseLog ("Using Graph AccessToken")

                $AZConnectParams = @{

                    Environment = $ConnectAzAccountEnvironmentName

                    SubscriptionId = $SubscriptionId

                    AccessToken = $ArmAccessToken

                    AccountId = $AccountId

                    GraphAccessToken = $GraphAccessToken

                    Scope = "Process"

                }

            }

            else

            {

                $AZConnectParams = @{

                    Environment = $ConnectAzAccountEnvironmentName

                    SubscriptionId = $SubscriptionId

                    AccessToken = $ArmAccessToken

                    AccountId = $AccountId

                    Scope = "Process"

                }

            }

        }

        else

        {

            Write-VerboseLog ("attempting login with TenantID")

            if( -not [string]::IsNullOrEmpty($GraphAccessToken))

            {

                Write-VerboseLog ("Using Graph AccessToken")

                $AZConnectParams = @{

                    Environment = $ConnectAzAccountEnvironmentName

                    TenantId = $TenantId

                    SubscriptionId = $SubscriptionId

                    AccessToken = $ArmAccessToken

                    AccountId = $AccountId

                    GraphAccessToken = $GraphAccessToken

                    Scope = "Process"

                }

            }

            else

            {

                $AZConnectParams = @{

                    Environment = $ConnectAzAccountEnvironmentName

                    TenantId = $TenantId

                    SubscriptionId = $SubscriptionId

                    AccessToken = $ArmAccessToken

                    AccountId = $AccountId

                    Scope = "Process"

                }

            }

        }

        Write-InfoLog $(Print-FunctionParameters -Message "Connect-AzAccount" -Parameters $AZConnectParams)

        Connect-AzAccount @AZConnectParams | Out-Null

        $azContext = Get-AzContext

        $TenantId = $azContext.Tenant.Id

    }

    return $TenantId

}

function Normalize-RegionName{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

param(

    [string] $Region

    )

    $regionName = $Region -replace '\s',''

    $regionName = $regionName.ToLower()

    return $regionName

}

function Validate-RegionName{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

param(

    [string] $Region,

    [ref] $SupportedRegions

    )

    $locations = Retry-Command -ScriptBlock { (Get-AzResourceProvider -ProviderNamespace Microsoft.AzureStackHCI).Where{($_.ResourceTypes.ResourceTypeName -eq 'clusters' -and $_.RegistrationState -eq 'Registered')}.Locations } -RetryIfNullOutput $true

    Write-VerboseLog ("RP supported regions : $locations")

    $locations | foreach {

        $regionName = Normalize-RegionName -Region $_

        if ($regionName -eq $Region)

        {

            # Supported region

            return $True

        }

    }

    $SupportedRegions.value = $locations -join ','

    return $False

}

function Get-ClusterDNSSuffix{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

param(

    [System.Management.Automation.Runspaces.PSSession] $Session

    )

    $clusterNameResourceGUID = Invoke-Command -Session $Session -ScriptBlock { (Get-ItemProperty -Path HKLM:\Cluster -Name ClusterNameResource).ClusterNameResource }

    $clusterDNSSuffix = Invoke-Command -Session $Session -ScriptBlock { (Get-ClusterResource $using:clusterNameResourceGUID | Get-ClusterParameter DnsSuffix).Value }

    return $clusterDNSSuffix

}

function Register-ResourceProviderIfRequired{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

param(

    [string] $ProviderNamespace

)

    $rpState = Get-AzResourceProvider -ProviderNamespace $ProviderNamespace

    $notRegisteredResourcesForRP = ($rpState.Where({$_.RegistrationState  -ne "Registered"}) | Measure-Object ).Count

    if ($notRegisteredResourcesForRP -eq 0 )

    { 

        Write-VerboseLog("$ProviderNamespace RP already registered, skipping registration")

    } 

    else

    {

        try

        {

            Register-AzResourceProvider -ProviderNamespace $ProviderNamespace | Out-Null

            Write-VerboseLog ("registered Resource Provider: $ProviderNamespace ")

        }

        catch

        {

            Write-ErrorLog -Exception $_ -Message "Exception occured while registering $ProviderNamespace RP" -ErrorAction Continue  

            throw 

        }

    }

}

function Get-ClusterDNSName{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

param(

    [System.Management.Automation.Runspaces.PSSession] $Session

    )

    $clusterNameResourceGUID = Invoke-Command -Session $Session -ScriptBlock { (Get-ItemProperty -Path HKLM:\Cluster -Name ClusterNameResource).ClusterNameResource }

    $clusterDNSName = Invoke-Command -Session $Session -ScriptBlock { (Get-ClusterResource $using:clusterNameResourceGUID | Get-ClusterParameter DnsName).Value }

    return $clusterDNSName

}

function Check-ConnectionToCloudBillingService{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

param(

    $ClusterNodes,

    [System.Management.Automation.PSCredential] $Credential,

    [string] $HealthEndpoint,

    [System.Collections.ArrayList] $HealthEndPointCheckFailedNodes,

    [string] $ClusterDNSSuffix

    )

    Foreach ($clusNode in $ClusterNodes)

    {

        $nodeSession = $null

        try

        {

            if($Credential -eq $Null)

            {

                $nodeSession = New-PSSession -ComputerName ($clusNode.Name + "." + $ClusterDNSSuffix)

            }

            else

            {

                $nodeSession = New-PSSession -ComputerName ($clusNode.Name + "." + $ClusterDNSSuffix) -Credential $Credential

            }

            # Check if node can reach cloud billing service

            $healthResponse = Invoke-Command -Session $nodeSession -ScriptBlock { Invoke-WebRequest $Using:HealthEndpoint -UseBasicParsing}

            if(($healthResponse -eq $Null) -or ($healthResponse.StatusCode -ne [int][system.net.httpstatuscode]::ok))

            {

                Write-VerboseLog ("StatusCode of invoking cloud billing service health endpoint on node " + $clusNode.Name + " : " + $healthResponse.StatusCode)

                $HealthEndPointCheckFailedNodes.Add($clusNode.Name) | Out-Null

                continue

            }

        }

        catch

        {

            Write-VerboseLog ("Exception occurred while testing health endpoint connectivity on Node: " + $clusNode.Name + " Exception: " + $_.Exception)

            $HealthEndPointCheckFailedNodes.Add($clusNode.Name) | Out-Null

            continue

        }

    }

}

function Setup-Certificates{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

param(

    $ClusterNodes,

    [System.Management.Automation.PSCredential] $Credential,

    [string] $ResourceName,

    [string] $ObjectId,

    [string] $CertificateThumbprint,

    [string] $AppId,

    [string] $TenantId,

    [string] $CloudId,

    [string] $ServiceEndpoint,

    [string] $BillingServiceApiScope,

    [string] $GraphServiceApiScope,

    [string] $Authority,

    [System.Collections.ArrayList] $NewCertificateFailedNodes,

    [System.Collections.ArrayList] $SetCertificateFailedNodes,

    [System.Collections.ArrayList] $OSNotLatestOnNodes,

    [System.Collections.HashTable] $CertificatesToBeMaintained,

    [string] $ClusterDNSSuffix,

    [string] $ResourceId

    )

    $userProvidedCertAdded = $false

    $certificatesToUpload = [System.Collections.ArrayList]::new()

    #1. Gather certificate from each node or check if user cert installed

    Foreach ($clusNode in $ClusterNodes)

    {

        $nodeSession = $null

        Write-VerboseLog ("Setting up certificate for node : {0}" -f $clusNode.Name)

        try

        {

            if($Credential -eq $Null)

            {

                $nodeSession = New-PSSession -ComputerName ($clusNode.Name + "." + $ClusterDNSSuffix)

            }

            else

            {

                $nodeSession = New-PSSession -ComputerName ($clusNode.Name + "." + $ClusterDNSSuffix) -Credential $Credential

            }

        }

        catch

        {

            Write-VerboseLog ("Exception occurred in establishing new PSSession to node $($clusNode.Name). ErrorMessage : " + $_.Exception.Message)

            Write-VerboseLog ($_)

            $NewCertificateFailedNodes.Add($clusNode.Name) | Out-Null

            $SetCertificateFailedNodes.Add($clusNode.Name) | Out-Null

            continue

        }

        # Check if all nodes have required OS version

        $nodeUBR = Invoke-Command -Session $nodeSession -ScriptBlock { (Get-ItemProperty -path "HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion").UBR }

        $nodeBuildNumber = Invoke-Command -Session $nodeSession -ScriptBlock { (Get-CimInstance -ClassName CIM_OperatingSystem).BuildNumber }

        if(($nodeBuildNumber -lt $GAOSBuildNumber) -or (($nodeBuildNumber -eq $GAOSBuildNumber) -and ($nodeUBR -lt $GAOSUBR)))

        {

            Write-VerboseLog ("$($clusNode.Name) does not have latest build number UBR: $nodeUBR, BuildNumber: $nodeBuildNumber")

            $OSNotLatestOnNodes.Add($clusNode.Name) | Out-Null

            continue

        }

        if([string]::IsNullOrEmpty($CertificateThumbprint))

        {

            # User did not specify certificate, using self-signed certificate

            try

            {

                $certBase64 = Invoke-Command -Session $nodeSession -ScriptBlock { New-AzureStackHCIRegistrationCertificate }

                Write-VerboseLog ("Node certificate generation successful")

            }

            catch

            {

                Write-VerboseLog ("Exception occurred in New-AzureStackHCIRegistrationCertificate. ErrorMessage : " + $_.Exception.Message)

                Write-VerboseLog ($_)

                $NewCertificateFailedNodes.Add($clusNode.Name) | Out-Null

                continue

            }

        }

        else

        {

            Write-VerboseLog ("using user specified Certificate")

            # Get certificate from cert store.

            $x509Cert = $Null;

            try

            {

                $x509Cert = Invoke-Command -Session $nodeSession -ScriptBlock { Get-ChildItem Cert:\LocalMachine -Recurse | Where { $_.Thumbprint -eq $Using:CertificateThumbprint} | Select-Object -First 1}

            }

            catch{}

            # Certificate not found on node

            if($x509Cert -eq $Null)

            {

                $CertificateNotFoundErrorMessage = $CertificateNotFoundOnNode -f $CertificateThumbprint,$clusNode.Name

                Write-VerboseLog ("$CertificateNotFoundErrorMessage")

                return $CertificateNotFoundErrorMessage

            }

            # Certificate should be valid for atleast 60 days from now

            $60days = New-TimeSpan -Days 60

            $expectedValidTo = (Get-Date) + $60days

            if($x509Cert.NotAfter -lt $expectedValidTo)

            {

                $UserCertificateValidationErrorMessage = ($UserCertValidationErrorMessage -f $CertificateThumbprint, $x509Cert.NotAfter)

                Write-VerboseLog ("$UserCertificateValidationErrorMessage")

                return $UserCertificateValidationErrorMessage

            }

            $certBase64 = [System.Convert]::ToBase64String($x509Cert.Export([Security.Cryptography.X509Certificates.X509ContentType]::Cert))

        }

        $Cert = [System.Security.Cryptography.X509Certificates.X509Certificate2]([System.Convert]::FromBase64String($CertBase64))

        # If user provided cert is not already added to AAD app or if we are using one certificate per node

        if(($userProvidedCertAdded -eq $false) -or ([string]::IsNullOrEmpty($CertificateThumbprint)))

        {

            $AddAppCredentialMessageProgress = $AddAppCredentialMessage -f $ResourceName

            Write-Progress -Id $MainProgressBarId -activity $RegisterProgressActivityName -status $AddAppCredentialMessageProgress -percentcomplete 80

            $certificatesToUpload.Add($CertBase64) | Out-Null

            $userProvidedCertAdded = $true

            Write-VerboseLog ("successfully verified KeyCredentials added to list")

        }

    }

    #2. Upload certificate to AAD via RP service

    $parameters = @{properties = @{certificates = $certificatesToUpload}}

    $uploadResponse = Execute-Without-ProgressBar -ScriptBlock { Invoke-AzResourceAction -ResourceId $resourceId -Parameters $parameters -ApiVersion $RPAPIVersion -Action uploadCertificate -Force }

    #3. Test certificate on each node

    Foreach ($clusNode in $ClusterNodes)

    {

        $nodeSession = $null

        Write-VerboseLog ("Testing certificate for node : {0}" -f $clusNode.Name)

        try

        {

            if($Credential -eq $Null)

            {

                $nodeSession = New-PSSession -ComputerName ($clusNode.Name + "." + $ClusterDNSSuffix)

            }else

            {

                $nodeSession = New-PSSession -ComputerName ($clusNode.Name + "." + $ClusterDNSSuffix) -Credential $Credential

            }

        }

        catch

        {

            Write-VerboseLog ("Exception occurred in establishing new PSSession to node $($clusNode.Name). ErrorMessage : " + $_.Exception.Message)

            Write-VerboseLog ($_)

            $NewCertificateFailedNodes.Add($clusNode.Name) | Out-Null

            $SetCertificateFailedNodes.Add($clusNode.Name) | Out-Null

            continue

        }

        # Set the certificate - Certificate will be set after testing the certificate by calling cloud service API

        try

        {

            $Params = @{

                        ServiceEndpoint = $ServiceEndpoint

                        BillingServiceApiScope = $BillingServiceApiScope

                        GraphServiceApiScope = $GraphServiceApiScope

                        AADAuthority = $Authority

                        AppId = $AppId

                        TenantId = $TenantId

                        CloudId = $CloudId

                        CertificateThumbprint = $CertificateThumbprint

                    }

            $SetAzureStackHCIRegistrationCertificateScript = {

                Set-AzureStackHCIRegistrationCertificate -ErrorAction Stop @Params

            }

            Run-InvokeCommand -ScriptBlock $SetAzureStackHCIRegistrationCertificateScript -Session $nodeSession -Params $Params

            Write-VerboseLog ("successfully updated authentication parameters on node: {0}" -f ($Params | Out-String))

        }

        catch

        {

            Write-VerboseLog ("Exception occurred in Set-AzureStackHCIRegistrationCertificate. ErrorMessage : " + $_.Exception.Message)

            $SetCertificateFailedNodes.Add($clusNode.Name) | Out-Null

            continue

        }

    }

    Write-VerboseLog ("Setup-Certificates succeeded, returning null")

    return $null

}

function Assign-ArcRoles {

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

    param(

        [string] $SpObjectId

    )

    $stopLoop = $false

    [int]$retryCount = "0"

    [int]$maxRetryCount = "14"

    do {

        try

        {

            $arcSPNRbacRoles = Get-AzRoleAssignment -ObjectId $SpObjectId

            $foundConnectedMachineOnboardingRole=$false

            $foundMachineResourceAdminstratorRole=$false

            $arcSPNRbacRoles | ForEach-Object {

                $roleName = $_.RoleDefinitionName

                if ($roleName -eq $AzureConnectedMachineOnboardingRole)

                {

                    $foundConnectedMachineOnboardingRole=$true

                }

                elseif ($roleName -eq $AzureConnectedMachineResourceAdministratorRole)

                {

                    $foundMachineResourceAdminstratorRole=$true

                }

            }

            if( -not $foundConnectedMachineOnboardingRole)

            {

                New-AzRoleAssignment -ObjectId $SpObjectId -RoleDefinitionName $AzureConnectedMachineOnboardingRole | Out-Null

            }

            if( -not $foundMachineResourceAdminstratorRole)

            {

                New-AzRoleAssignment -ObjectId $SpObjectId -RoleDefinitionName $AzureConnectedMachineResourceAdministratorRole | Out-Null

            }

            Write-VerboseLog ("successfully assigned RBAC Roles to ARC SP: {0}" -f $SpObjectId)

            $stopLoop = $true

        }

        catch

        {

            $positionMessage = $_.InvocationInfo.PositionMessage

            if ($retryCount -ge $maxRetryCount)

            {

                # Timed out.

                Write-WarnLog ("Failed to assign roles to service principal with object Id $($SpObjectId). ErrorMessage: " + $_.Exception.Message + " PositionalMessage: " + $positionMessage)

                return $false

            }

            if ($_.Exception.Response.Content.Contains("Microsoft.Authorization/roleAssignments/write")) {

                Write-VerboseLog ("New-AzRoleAssignment Missing Permissions. IsWAC: $IsWAC")

                if ($IsWAC -eq $false)

                {

                    # Insufficient privilige error.

                    Write-ErrorLog -Message $ArcAgentRolesInsufficientPreviligeMessage -Exception $_ -ErrorAction Continue

                }

                return $false

            }

            # Service principal creation hasn't propogated fully yet, usually takes 10-20 seconds.

            Write-VerboseLog ("Could not assign roles to service principal with Object Id $($SpObjectId). Retrying in 10 seconds...")

            Start-Sleep -Seconds 10

            $retryCount = $retryCount + 1

        }

    }

    While (-Not $stopLoop)

    return $true

}

function Verify-ArcSettings{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

    param(

        [string] $ArcResourceId,

        [System.Management.Automation.Runspaces.PSSession] $Session

    )

    Write-VerboseLog "Verifying Arc settings resource"

    $verifyArcSettingsOutput = [ErrorDetail]::ArcIntegrationFailedOnNodes

    $clusterNodes = Invoke-Command -Session $Session -ScriptBlock { Get-ClusterNode } | ForEach-Object { ($_.Name) }

    $limit = (Get-Date).AddMinutes($GetArcSettingsWaitTimeMinutes)

    while ((Get-Date) -lt $limit) {

        if($verifyArcSettingsOutput -eq [ErrorDetail]::ArcIntegrationFailedOnNodes)

        {

            Write-VerboseLog "Waiting for $GetArcSettingsSleepTimeSeconds seconds"

            Start-Sleep -Seconds $GetArcSettingsSleepTimeSeconds

        }

        else 

        {

            Write-VerboseLog "Arc settings resource successfully verified"

            break

        }

        $verifyArcSettingsOutput = [ErrorDetail]::Success

        $arcSettingsResponse = Get-AzResource -ResourceId $ArcResourceId -ApiVersion $HCIArcAPIVersion

        $arcSettingsNodesMap = @{}

        $arcSettingsResponse.properties.perNodeDetails | ForEach-Object { $arcSettingsNodesMap.Add($_.Name, $_.State) } | Out-Null

        Foreach ($clusterNode in $clusterNodes)

        {

            if((($arcSettingsNodesMap.Contains($clusterNode) -eq $false) | Out-Null) -or ($arcSettingsNodesMap[$clusterNode] -ne "Connected"))

            {

                Write-VerboseLog "Cluster node : $clusterNode is not in connected state in ArcSettings."

                $verifyArcSettingsOutput = [ErrorDetail]::ArcIntegrationFailedOnNodes

            }

        }

    }

    return $verifyArcSettingsOutput

}

function Verify-ArcRegistration{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

    param(

        [string] $ArcResourceId,

        [System.Management.Automation.Runspaces.PSSession] $Session,

        [bool] $IsManagementNode,

        [System.Management.Automation.PSCredential] $Credential,

        [string] $ComputerName

    )

    Write-VerboseLog "Verifying Arc for Servers registration"

    # Get and verify Arc Settings resource

    Write-Progress -Id $ArcProgressBarId -ParentId $MainProgressBarId -Activity $RegisterArcProgressActivityName -Status $VerifyingArcMessage -PercentComplete 0

    $arcRegistrationOutput = Verify-ArcSettings -Session $Session -ArcResourceId $ArcResourceId

    $arcSettingsVerificationCount = 1

    Write-Progress -Id $ArcProgressBarId -ParentId $MainProgressBarId -Activity $RegisterArcProgressActivityName -Status $VerifyingArcMessage -PercentComplete 10

    while($arcSettingsVerificationCount -lt ($ArcSettingsVerificationLimit + 1 ))

    {

        if($arcRegistrationOutput -eq [ErrorDetail]::ArcIntegrationFailedOnNodes)

        {

            Write-VerboseLog "Unable to find the cluster nodes in Arc Settings resource. Triggering Sync-AzureStackHCI again."

            # Trigger Sync-AzureStackHCI to patch Arc settings

            Invoke-Command -Session $Session -ScriptBlock { Sync-AzureStackHCI }

            # Get and verify Arc Settings resource

            $arcRegistrationOutput = Verify-ArcSettings -Session $Session -ArcResourceId $ArcResourceId

            Write-Progress -Id $ArcProgressBarId -ParentId $MainProgressBarId -Activity $RegisterArcProgressActivityName -Status $VerifyingArcMessage -PercentComplete $($arcSettingsVerificationCount * 20)

        }

        else 

        {

            break    

        }

        $arcSettingsVerificationCount++

    }

    if($arcRegistrationOutput -eq [ErrorDetail]::ArcIntegrationFailedOnNodes)

    {

        Write-VerboseLog $ArcSettingsPatchFailedLogMessage

        Write-NodeEventLog -Message $ArcSettingsPatchFailedLogMessage -EventID 9123 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName

        Write-Warning $ArcSettingsPatchFailedWarningMessage

    }

    else

    {

        Write-VerboseLog "Successfully verified Arc for Servers registration. Arc for Servers registration succeeded."

    }

    return $arcRegistrationOutput

}

function Verify-NodesArcRegistrationState{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

    param(

        $ClusterNodes,

        [string] $SubscriptionId,

        [string] $ArcResourceGroupName,

        [System.Management.Automation.PSCredential] $Credential,

        [string] $ClusterDNSSuffix

    )

    $NodesAlreadyArcEnabledDifferentResource = [System.Collections.ArrayList]::new()

    foreach ($clusterNode in $clusterNodes)

    {

        # Create session into the cluster node

        $clusterNodeWithDNSSuffix = "$clusterNode.$ClusterDNSSuffix"

        if($Null -eq $Credential)

        {

            $nodeSession = New-PSSession -ComputerName $clusterNodeWithDNSSuffix

        }

        else

        {

            $nodeSession = New-PSSession -ComputerName $clusterNodeWithDNSSuffix -Credential $Credential

        }

        try

        {

            Invoke-Command -Session $nodeSession -ScriptBlock $CheckNodeArcRegistrationStateScriptBlock -ErrorAction Stop

        }

        catch 

        {

            if(($null -ne $_.Exception.Message) -and $_.Exception.Message.Contains($clusterNode) -and $_.Exception.Message.Contains("Subscription Id") -and $_.Exception.Message.Contains("Resource Group"))

            {

                $NodesAlreadyArcEnabledDifferentResource.Add($_.Exception.Message) | Out-Null

            }

            else

            {

                Write-WarnLog $_.Exception.Message

            }

        }

        # Cleanup node session

        Remove-PSSession $nodeSession | Out-Null 

    }

    if($NodesAlreadyArcEnabledDifferentResource.Length -gt 0)

    {

        $NodesAlreadyArcEnabledDifferentResource = $NodesAlreadyArcEnabledDifferentResource -join "`n"

        $ExceptionMessage = $ArcAlreadyEnabledInADifferentResourceError -f $NodesAlreadyArcEnabledDifferentResource

        throw $ExceptionMessage

    }

}

function Enable-ArcForServers{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

param(

    [System.Management.Automation.Runspaces.PSSession] $Session,

    [System.Management.Automation.PSCredential] $Credential,

    [string] $ClusterDNSSuffix

    )

    # Create new sessions for all nodes in cluster.

    $clusterNodeNames = Invoke-Command -Session $Session -ScriptBlock { Get-ClusterNode } | ForEach-Object { ($_.Name + "." + $ClusterDNSSuffix) }

    if($Credential -eq $Null)

    {

        $clusterNodeSessions = New-PSSession -ComputerName $clusterNodeNames

    }

    else

    {

        $clusterNodeSessions = New-PSSession -ComputerName $clusterNodeNames -Credential $Credential

    }

    $retStatus = [ErrorDetail]::Success

    # Start running

    try

    {

        Invoke-Command -Session $clusterNodeSessions -ScriptBlock {

            # Cluster scheduled task is triggered asynchronously. Use Get-ScheduledTask to get the task state and wait for its completion.

            Get-ScheduledTask -TaskName $using:ArcRegistrationTaskName | Start-ScheduledTask

            Start-Sleep -Seconds $using:ClusterScheduledTaskSleepTimeSeconds

            $limit = (Get-Date).AddMinutes($using:ClusterScheduledTaskWaitTimeMinutes)

            while ((Get-ScheduledTask -TaskName $using:ArcRegistrationTaskName).State -eq $using:ClusterScheduledTaskRunningState -and (Get-Date) -lt $limit) {

                Start-Sleep -Seconds $using:ClusterScheduledTaskSleepTimeSeconds

            }

            if((Get-ScheduledTask -TaskName $using:ArcRegistrationTaskName).State -ne $using:ClusterScheduledTaskReadyState)

            {

                throw ("Cluster scheduled task runtime exceeded the max configured wait time of {0} minutes" -f ($using:ClusterScheduledTaskWaitTimeMinutes))

            }

        }

        # Show warning if any of the nodes failed to register with Arc

        $enabledArcStatus = [ArcStatus]::Enabled

        Invoke-Command -Session $Session -ScriptBlock {

            $nodeStatus = $(Get-AzureStackHCIArcIntegration).NodesArcStatus

            if (($null -ne $nodeStatus) -and ($nodeStatus.Count -ge $clusterNodeNames.Count))

            {

                Foreach ($node in $nodeStatus.Keys)

                {

                    if($nodeStatus[$node] -ne $using:enabledArcStatus)

                    {

                        throw $using:RegisterArcFailedExceptionMessage

                    }

                }

            }

            else

            {

                throw $using:RegisterArcFailedExceptionMessage

            }

        }

    }

    catch

    {

        Write-ErrorLog ($RegisterArcFailedErrorMessage)

        $retStatus = [ErrorDetail]::ArcIntegrationFailedOnNodes

        throw $RegisterArcFailedErrorMessage

    }

    # Cleanup sessions.

    Remove-PSSession $clusterNodeSessions | Out-Null

    return $retStatus

}

function Disable-ArcForServers{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

param(

    [System.Management.Automation.Runspaces.PSSession] $Session,

    [System.Management.Automation.PSCredential] $Credential,

    [string] $ClusterDNSSuffix

    )

    $res = $true

    $AgentUninstaller_LogFile = $env:windir + '\Tasks\ArcForServers' + '\ConnectedMachineAgentUninstallationLog.txt';

    $AgentInstaller_Name      = $env:windir + '\Tasks\ArcForServers' + '\AzureConnectedMachineAgent.msi';

    $AgentExecutable_Path     = $Env:Programfiles + '\AzureConnectedMachineAgent\azcmagent.exe'

    $clusterNodeNames = Invoke-Command -Session $Session -ScriptBlock { Get-ClusterNode } | ForEach-Object { ($_.Name + "." + $ClusterDNSSuffix) }

    if($Credential -eq $Null)

    {

        $clusterNodeSessions = New-PSSession -ComputerName $clusterNodeNames

    }

    else

    {

        $clusterNodeSessions = New-PSSession -ComputerName $clusterNodeNames -Credential $Credential

    }

    $nodeArcStatus = Invoke-Command -Session $Session -ScriptBlock { $(Get-AzureStackHCIArcIntegration)}

    if($nodeArcStatus.ClusterArcStatus -eq [ArcStatus]::Disabled)

    {

        Write-VerboseLog ("Arc already disabled on $clusterNodeNames")

        return $res

    }

    $disableFailedOnANode = $false

    try

    {

        Invoke-Command -Session $clusterNodeSessions -ScriptBlock {

            Disable-AzureStackHCIArcIntegration -AgentUninstallerLogFile $using:AgentUninstaller_LogFile -AgentInstallerName $using:AgentInstaller_Name -AgentExecutablePath $using:AgentExecutable_Path

        }

    }

    catch

    {

        $positionMessage = $_.InvocationInfo.PositionMessage

        Write-VerboseLog ("Exception occurred in un-registering nodes from Arc For Servers. ErrorMessage: " + $_.Exception.Message + " PositionalMessage: " + $positionMessage)

        Write-VerboseLog ($_)

        $disableFailedOnANode = $true

    }

    if ($disableFailedOnANode -eq $true)

    {

        $nodeStatus = Invoke-Command -Session $Session -ScriptBlock { $(Get-AzureStackHCIArcIntegration).NodesArcStatus }

        foreach ($node in $nodeStatus.Keys)

        {

            if ($nodeStatus[$node] -ne [ArcStatus]::Disabled)

            {

                $res = $false

                $UnregisterArcFailedErrorMessage = $UnregisterArcFailedError -f $node

                Write-ErrorLog -Message $UnregisterArcFailedErrorMessage -ErrorAction Continue

            }

        }

    }

    # Cleanup sessions.

    Remove-PSSession $clusterNodeSessions | Out-Null

    return $res

}

function Register-ArcForServers{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

param(

    [bool] $IsManagementNode,

    [string] $ComputerName,

    [System.Management.Automation.PSCredential] $Credential,

    [string] $TenantId,

    [string] $SubscriptionId,

    [string] $ResourceGroup,

    [string] $Region,

    [string] $ClusterDNSSuffix,

    [System.Management.Automation.PSCredential] $ArcSpnCredential,

    [Switch] $IsWAC,

    [string] $Environment,

    [Object] $ArcResource

    )

    if($IsManagementNode)

    {

        if($Credential -eq $Null)

        {

            $session = New-PSSession -ComputerName $ComputerName

        }

        else

        {

            $session = New-PSSession -ComputerName $ComputerName -Credential $Credential

        }

    }

    else

    {

        $session = New-PSSession -ComputerName localhost

    }

    Write-Progress -Id $ArcProgressBarId -ParentId $MainProgressBarId -Activity $RegisterArcProgressActivityName -Status $FetchingRegistrationState -PercentComplete 1

    # Register resource providers

    Write-Progress -Id $ArcProgressBarId -ParentId $MainProgressBarId -Activity $RegisterArcProgressActivityName -Status $RegisterArcRPMessage -PercentComplete 10

    Write-VerboseLog ("$RegisterArcRPMessage")

    Register-ResourceProviderIfRequired -ProviderNamespace "Microsoft.HybridCompute"

    Register-ResourceProviderIfRequired -ProviderNamespace "Microsoft.GuestConfiguration"

    if( ($Environment -eq $AzureCanary) -or ($Environment -eq $AzureCloud) )

    {

        Write-VerboseLog ("Registering Microsoft.HybridConnectivity Resource provider")

        Register-ResourceProviderIfRequired -ProviderNamespace "Microsoft.HybridConnectivity"    

    }

    if($ArcSpnCredential -ne $Null)

    {

        ## Arc spn and password is provided

        $AppId = $ArcSpnCredential.UserName

        $Secret = $ArcSpnCredential.GetNetworkCredential().Password

        Write-VerboseLog ("ARC Spn and password provided")

        $arcSPN = Retry-Command -ScriptBlock { Get-AzADServicePrincipal -ApplicationId  $AppId -ErrorAction SilentlyContinue } -RetryIfNullOutput $false

        if(-Not [string]::IsNullOrEmpty($arcSPN)) # $arcSPN will be null if a user has registered using ArmAccessToken and AccountId

        {

            $rolesPresent = Verify-arcSPNRoles -arcSPNObjectID $arcSPN.Id

            if(-not $rolesPresent)

            {

                Write-VerboseLog ("Supplied ARC SPN: $($arcSPN.ID)  does not have required roles:$AzureConnectedMachineOnboardingRole and $AzureConnectedMachineResourceAdministratorRole. Aborting arc onboarding.")

                return [ErrorDetail]::ArcPermissionsMissing

            }

        }

        else

        {

            Write-VerboseLog "Unable to fetch ArcSpnCredential role assignments. Continuing without checking role assignments."

        }

    }

    else

    {

        if($Null -eq $ArcResource.Properties.arcApplicationObjectId)

        {

            Write-VerboseLog ("Initiating Arc AAD App creation by HCI RP")

            Write-Progress -Id $ArcProgressBarId -ParentId $MainProgressBarId -Activity $RegisterArcProgressActivityName -Status $ArcAADAppCreationMessage -PercentComplete 30

            Execute-Without-ProgressBar -ScriptBlock { Invoke-AzResourceAction -ResourceId $arcResourceId -ApiVersion $HCIArcAPIVersion -Action createArcIdentity -Force } | Out-Null

            $ArcResource = Get-AzResource -ResourceId $arcResourceId -ApiVersion $HCIArcAPIVersion -ErrorAction Ignore

            Write-VerboseLog ("Created Arc AAD App by HCI service")

        }

        else

        {

            Write-VerboseLog ("Arc AAD App: $ArcApplicationId already created by service")

        }

        $AppId = $ArcResource.Properties.arcApplicationClientId

        $ArcSpObjectId = $ArcResource.Properties.arcServicePrincipalObjectId

        $roleAssignmentStatus = Assign-ArcRoles -SpObjectId $ArcSpObjectId

        if($roleAssignmentStatus -eq $false)

        {

            return [ErrorDetail]::ArcPermissionsMissing

        }

        # Generate password for Arc SPN by calling HCI RP

        Write-VerboseLog("Generating credentials for ARC SPN")

        $arcSPNPassword = Execute-Without-ProgressBar -ScriptBlock { Invoke-AzResourceAction -ResourceId $arcResourceId -ApiVersion $HCIArcAPIVersion -Action generatePassword -Force }

        Write-VerboseLog("Generated credentials successfully for ARC SPN")

        $Secret = $arcSPNPassword.secretText 

        $clusterDNSName = Get-ClusterDNSName -Session $session

    }

    $arcCommand = Invoke-Command -Session $session -ScriptBlock { Get-Command -Name 'Initialize-AzureStackHCIArcIntegration' -ErrorAction SilentlyContinue } 

    if ($arcCommand.Parameters.ContainsKey('Cloud'))

    {

        $arcEnvironment = $Environment

        if( $Environment -eq $AzureCanary)

        {

            $arcEnvironment = $AzureCloud

        }

        Write-VerboseLog ("invoking Initialize-AzureStackHCIArcIntegration with cloud switch")

        $ArcRegistrationParams = @{

            AppId = $AppId

            Secret = $Secret

            TenantId = $TenantId

            SubscriptionId = $SubscriptionId

            Region = $Region

            ResourceGroup = $ResourceGroup

            cloud  = $arcEnvironment 

        }

    }

    else

    {

        Write-VerboseLog ("invoking Initialize-AzureStackHCIArcIntegration without cloud switch")

        $ArcRegistrationParams = @{

            AppId = $AppId

            Secret = $Secret

            TenantId = $TenantId

            SubscriptionId = $SubscriptionId

            Region = $Region

            ResourceGroup = $ResourceGroup 

        }    

    }

    # Save Arc context.

    Write-Progress -Id $ArcProgressBarId -ParentId $MainProgressBarId -Activity $RegisterArcProgressActivityName -Status $SetupArcMessage -PercentComplete 40 

    Invoke-Command -Session $session -ScriptBlock { Initialize-AzureStackHCIArcIntegration @Using:ArcRegistrationParams } | Out-Null

    Write-VerboseLog ("successfully invoked Initialize-AzureStackHCIArcIntegration")

    # Register clustered scheduled task

    try

    {

        # Connect to cluster and use that session for registering clustered scheduled task

        Write-VerboseLog ("Registering Clustered Scheduled task for Arc Installation")

        if($Credential -eq $Null)

        {

            $clusterNameSession = New-PSSession -ComputerName ($clusterDNSName + "." + $ClusterDNSSuffix)

        }

        else

        {

            $clusterNameSession = New-PSSession -ComputerName ($clusterDNSName + "." + $ClusterDNSSuffix) -Credential $Credential

        }

        Invoke-Command -Session $clusterNameSession -ScriptBlock { 

            $task =  Get-ScheduledTask -TaskName $using:ArcRegistrationTaskName -ErrorAction SilentlyContinue

            $action = New-ScheduledTaskAction -Execute "powershell.exe" -Argument "-Command $using:registerArcScript"

            # Repeat the script every hour of every day, starting from now.

            $date = Get-Date

            $dailyTrigger = New-ScheduledTaskTrigger -Daily -At $date

            $hourlyTrigger = New-ScheduledTaskTrigger -Once -At $date -RepetitionInterval (New-TimeSpan -Hours 1) -RepetitionDuration (New-TimeSpan -Hours 23 -Minutes 55)

            $dailyTrigger.Repetition = $hourlyTrigger.Repetition

            if (-Not $task)

            {

                Register-ClusteredScheduledTask -TaskName $using:ArcRegistrationTaskName -TaskType ClusterWide -Action $action -Trigger $dailyTrigger

            }

            else

            {

                # Update cluster schedule task.

                Set-ClusteredScheduledTask -TaskName $using:ArcRegistrationTaskName -Action $action -Trigger $dailyTrigger

            }

        } | Out-Null

    }

    catch

    {

        $positionMessage = $_.InvocationInfo.PositionMessage

        Write-ErrorLog ("Exception occurred in registering cluster scheduled task") -Exception $_ -Category OperationStopped -ErrorAction Continue

        throw

    }

    finally

    {

        if($clusterNameSession -ne $null)

        {

            Remove-PSSession $clusterNameSession -ErrorAction Ignore | Out-Null

        }

    }

    # Run

    Write-Progress -Id $ArcProgressBarId -ParentId $MainProgressBarId -Activity $RegisterArcProgressActivityName -Status $StartingArcAgentMessage -PercentComplete 50

    $arcResult = Enable-ArcForServers -Session $session -Credential $Credential -ClusterDNSSuffix $ClusterDNSSuffix

    if($arcResult -eq [ErrorDetail]::Success)

    {

        Write-VerboseLog ("Successfully registered cluster with Arc for Servers.")

        $arcResult = Verify-ArcRegistration -ArcResourceId $arcResourceId -Session $session -Credential $Credential -ComputerName $ComputerName -IsManagementNode $IsManagementNode

    }

    Write-Progress -Id $ArcProgressBarId -activity $RegisterArcProgressActivityName -Completed

    Remove-PSSession $session | Out-Null

    return $arcResult

}

function Verify-arcSPNRoles{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

param(

    [string] $arcSPNObjectID

)

    $arcSPNRbacRoles = Get-AzRoleAssignment -ObjectId $arcSPNObjectID

    $foundConnectedMachineOnboardingRole=$false

    $foundMachineResourceAdminstratorRole=$false

    $arcSPNRbacRoles | ForEach-Object { 

        $roleName = $_.RoleDefinitionName

        if ($roleName -eq $AzureConnectedMachineOnboardingRole)

        {

            $foundConnectedMachineOnboardingRole=$true

        }

        elseif ($roleName -eq $AzureConnectedMachineResourceAdministratorRole)

        {

            $foundMachineResourceAdminstratorRole=$true

        }

    }

    return $foundMachineResourceAdminstratorRole -and $foundConnectedMachineOnboardingRole 

}

function Unregister-ArcForServers{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

param(

    [bool] $IsManagementNode,

    [string] $ComputerName,

    [System.Management.Automation.PSCredential] $Credential,

    [string] $ResourceId,

    [Switch] $Force,

    [string] $ClusterDNSSuffix

    )

    if($IsManagementNode)

    {

        Write-VerboseLog ("connecting via Management node")

        if($Credential -eq $Null)

        {

            $session = New-PSSession -ComputerName $ComputerName

        }

        else

        {

            $session = New-PSSession -ComputerName $ComputerName -Credential $Credential

        }

    }

    else

    {

        $session = New-PSSession -ComputerName localhost

    }

    $clusterName = Invoke-Command -Session $session -ScriptBlock { (Get-Cluster).Name }

    $clusterDNSName = Get-ClusterDNSName -Session $session

    $cmdlet = Invoke-Command -Session $session -ScriptBlock { Get-Command Get-AzureStackHCIArcIntegration -Type Cmdlet -ErrorAction Ignore }

    if($cmdlet -eq $null)

    {

        Write-VerboseLog ("cluster does not support ARC yet, no operation")

        return $true

    }

    Write-Progress -Id $ArcProgressBarId -ParentId $MainProgressBarId -Activity $UnregisterArcProgressActivityName -Status $FetchingRegistrationState -PercentComplete 1

    $arcStatus = Invoke-Command -Session $session -ScriptBlock { Get-AzureStackHCIArcIntegration }

    $hciStatus = Invoke-Command -Session $session -ScriptBlock { Get-AzureStackHCI }

    $arcResourceId = $ResourceId + $HCIArcInstanceName

    $arcResourceExtensions = $arcResourceId + $HCIArcExtensions

    if ($arcStatus.ClusterArcStatus -eq [ArcStatus]::Enabled)

    {

        Invoke-Command -Session $session -ScriptBlock { Clear-AzureStackHCIArcIntegration -SetDisableInProgress} | Out-Null

        Write-VerboseLog ("Successfully executed Clear-AzureStackHCIArcIntegration")

    }

    $arcres = Get-AzResource -ResourceId $arcResourceId -ApiVersion $HCIArcAPIVersion -ErrorAction Ignore

    if($arcres -ne $null)

    {

        Write-VerboseLog ("Disabling Azure Arc for Servers Mandatory extensions")

        Write-Progress -Id $ArcProgressBarId -ParentId $MainProgressBarId -Activity $UnregisterArcProgressActivityName -Status $DisablingDefaultExtensions -PercentComplete 2

        Execute-Without-ProgressBar -ScriptBlock { Invoke-AzResourceAction -ResourceId $arcResourceId -ApiVersion $HCIArcAPIVersion -Action InitializeDisableProcess -Force } | Out-Null

        Write-VerboseLog ("querying installed extensions")

        $extensions = Get-AzResource -ResourceId $arcResourceExtensions -ApiVersion $HCIArcExtensionAPIVersion

        $ArcResourceGroupName = $arcres.Properties.arcInstanceResourceGroup

    }

    $extensionsCleanupSucceeded = $true

    if($extensions -ne $null)

    {

        # Remove extensions one by one. If -Force is passed write warning and proceed, else write error and stop

        for($extIndex = 0; $extIndex -lt $extensions.Count; $extIndex++)

        {

            $extension = $extensions[$extIndex]

            # Default extension not deleted completely

            if($extension.Properties.managedBy -eq "Azure")

            {

                Write-VerboseLog ("Mandatory extension: {0} is not deleted yet" -f $extensions.Name)

                continue

            }

            try

            {

                $DeletingExtensionMessageProgress = $DeletingExtensionMessage -f $extension.Name, $clusterName

                Write-VerboseLog ("$DeletingExtensionMessageProgress")

                $ProgressRange = 27 # Difference between previous and next progress number

                $PercentComplete = [Math]::Round( 3 + ((($extIndex+1)/($extensions.Count)) * $ProgressRange) )

                Write-Progress -Id $ArcProgressBarId -ParentId $MainProgressBarId -Activity $UnregisterArcProgressActivityName -Status $DeletingExtensionMessageProgress -PercentComplete $PercentComplete

                Execute-Without-ProgressBar -ScriptBlock { Remove-AzResource -ResourceId $extension.ResourceId -ApiVersion $HCIArcExtensionAPIVersion -Force -ErrorAction Stop | Out-Null } 

                Write-VerboseLog ("completed extension deletion {0}" -f $extension.Name)

            }

            catch

            {

                $extensionsCleanupSucceeded = $false

                $positionMessage = $_.InvocationInfo.PositionMessage

                Write-VerboseLog ("Exception occurred in removing extension " + $extension.Name + ". ErrorMessage: " + $_.Exception.Message + " PositionalMessage: " + $positionMessage)

                if($Force -eq $true)

                {

                    $ArcExtensionCleanupFailedWarningMsg = $ArcExtensionCleanupFailedWarning -f $extension.Name

                    Write-WarnLog ($ArcExtensionCleanupFailedWarningMsg)

                }

                else

                {

                    $ArcExtensionCleanupFailedErrorMsg = $ArcExtensionCleanupFailedError -f $extension.Name

                    Write-ErrorLog -Message $ArcExtensionCleanupFailedErrorMsg -Exception $_ -ErrorAction Continue

                }

            }

        }

    }

    if(($Force -eq $false) -and ($extensionsCleanupSucceeded -eq $false))

    {

        Write-VerboseLog ("not completing ARC unregistration because of failures")

        return $false

    }

    # Clean up clustered scheduled task, if it exists.

    try

    {

        # Connect to cluster and use that session for Unregistering clustered scheduled task

        if($Credential -eq $Null)

        {

            $clusterNameSession = New-PSSession -ComputerName ($clusterDNSName + "." + $ClusterDNSSuffix)

        }

        else

        {

            $clusterNameSession = New-PSSession -ComputerName ($clusterDNSName + "." + $ClusterDNSSuffix) -Credential $Credential

        }

        Write-VerboseLog ("cleaning up cluster scheduled task")

        Invoke-Command -Session $clusterNameSession -ScriptBlock {

            $task =  Get-ScheduledTask -TaskName $using:ArcRegistrationTaskName -ErrorAction SilentlyContinue

            if ($task)

            {

                Unregister-ClusteredScheduledTask -TaskName $using:ArcRegistrationTaskName

            }

        } | Out-Null

    }

    catch

    {

        $positionMessage = $_.InvocationInfo.PositionMessage

        Write-ErrorLog ("Exception occurred in unregistering cluster scheduled task") -Exception $_ -Category OperationStopped -ErrorAction Continue

        throw

    }

    finally

    {

        if($clusterNameSession -ne $null)

        {

            Remove-PSSession $clusterNameSession -ErrorAction Ignore | Out-Null

        }

    }

    # Unregister all nodes.

    Write-Progress -Id $ArcProgressBarId -ParentId $MainProgressBarId -Activity $UnregisterArcProgressActivityName -Status $WaitingUnregisterMessage -PercentComplete 30

    $disabled = Disable-ArcForServers -Session $session -Credential $Credential -ClusterDNSSuffix $ClusterDNSSuffix

    if ($disabled)

    {

        # Call HCI RP to clean up all Arc proxy resources

        $arcResource = Get-AzResource -ResourceId $arcResourceId -ApiVersion $HCIArcAPIVersion -ErrorAction Ignore

        if($arcResource -ne $Null)

        {

            $DeletingArcCloudResourceMessageProgress = $DeletingArcCloudResourceMessage -f $arcResourceId

            Write-Progress -Id $ArcProgressBarId -ParentId $MainProgressBarId -Activity $UnregisterArcProgressActivityName -Status $DeletingArcCloudResourceMessageProgress -PercentComplete 40

            Execute-Without-ProgressBar -ScriptBlock {Remove-AzResource -ResourceId $arcResourceId -ApiVersion $HCIArcAPIVersion -Force | Out-Null } 

            if(($Null -ne $arcStatus) -and ($Null -ne $arcStatus.ApplicationId))

            {

                $arcAADApplication = Get-AzADApplication -ApplicationId $arcStatus.ApplicationId -ErrorAction:SilentlyContinue

                if($Null -ne $arcAADApplication)

                {

                    # when registration happens via older version of the registration script and unregistration happens via newever version

                    # service will not be able to delete the app since it does not own it.

                    try 

                    {

                        Write-VerboseLog ("Deleting ARC AAD application: $($arcStatus.ApplicationId)")

                        Remove-AzADApplication -ApplicationId $arcStatus.ApplicationId -ErrorAction Stop | Out-Null

                    }

                    catch 

                    {

                        #consume exception, this is best effort. Log warning and continue if it fails.

                        $msg = "Deleting ARC AAD application Failed $($arcStatus.ApplicationId) . ErrorMessage : {0}. Please delete it manually." -f ($_.Exception.Message)

                        Write-NodeEventLog -Message $msg  -EventID 9011 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName

                        Write-WarnLog ($msg)

                    }

                }

            }

            else

            {

                Write-VerboseLog ("ARC not enabled on the cluster, ignoring ARC application deletion check")

            }

        }

        if ($arcStatus.ClusterArcStatus -ne [ArcStatus]::Disabled)

        {

            Write-Progress -Id $ArcProgressBarId -ParentId $MainProgressBarId -Activity $UnregisterArcProgressActivityName -Status $CleanArcMessage -PercentComplete 80

            Invoke-Command -Session $session -ScriptBlock { Clear-AzureStackHCIArcIntegration }

            Write-VerboseLog ("Successfully unregistered cluster from Arc for Servers")

        }

        if (-not([string]::IsNullOrEmpty($ArcResourceGroupName))) 

        {

            # Removing Arc onboarding permissions from HCI RP App on Arc resource group 

            Remove-ArcRoleAssignments -ResourceGroupName $ArcResourceGroupName -ResourceId $ResourceId | Out-Null

            Remove-ResourceGroup -ResourceGroupName $ArcResourceGroupName

        }

    }

    Write-Progress -Id $ArcProgressBarId -ParentId $MainProgressBarId -activity $UnregisterArcProgressActivityName -Completed

    return $disabled

}

class Identity {

    [string] $type = "SystemAssigned"

}

class ResourceProperties {

    [string] $location

    [object] $properties

    [System.Collections.Hashtable] $tags

    [Identity] $identity = [Identity]::new()

    ResourceProperties (

        [string] $location,

        [object] $properties,

        [System.Collections.Hashtable] $tags

    )

    {

        $this.location = $location

        $this.properties = $properties

        $this.tags = $tags

    }

}

enum OperationStatus 

{

    Unused;

    Failed;

    Success;

    Cancelled;

    RegisterSucceededButArcFailed;

    ArcFailed

}

enum ConnectionTestResult 

{

    Unused;

    Succeeded;

    Failed

}

enum ErrorDetail 

{

    Unused;

    ArcPermissionsMissing;

    ArcIntegrationFailedOnNodes;

    Success

}

<#

    .Description

    Register-AzStackHCI creates a Microsoft.AzureStackHCI cloud resource representing the on-premises cluster and registers the on-premises cluster with Azure.

    .PARAMETER SubscriptionId

    Specifies the Azure Subscription to create the resource. SubscriptionId is a Mandatory parameter.

    .PARAMETER Region

    Specifies the Region to create the resource. Region is a Mandatory parameter.

    .PARAMETER ResourceName

    Specifies the resource name of the resource created in Azure. If not specified, on-premises cluster name is used.

    .PARAMETER Tag

    Specifies the resource tags for the resource in Azure in the form of key-value pairs in a hash table. For example: @{key0="value0";key1=$null;key2="value2"}

    .PARAMETER TenantId

    Specifies the Azure TenantId.

    .PARAMETER ResourceGroupName

    Specifies the Azure Resource Group name. If not specified <LocalClusterName>-rg will be used as resource group name.

    .PARAMETER ArmAccessToken

    Specifies the ARM access token. Specifying this along with AccountId will avoid Azure interactive logon.

    .PARAMETER GraphAccessToken

    GraphAccessToken is deprecated.

    .PARAMETER AccountId

    Specifies the Account Id. Specifying this along with ArmAccessToken will avoid Azure interactive logon.

    .PARAMETER EnvironmentName

    Specifies the Azure Environment. Default is AzureCloud. Valid values are AzureCloud, AzureChinaCloud, AzurePPE, AzureCanary, AzureUSGovernment

    .PARAMETER ComputerName

    Specifies the cluster name or one of the cluster node in on-premise cluster that is being registered to Azure.

    .PARAMETER CertificateThumbprint

    Specifies the thumbprint of the certificate available on all the nodes. User is responsible for managing the certificate.

    .PARAMETER RepairRegistration

    Repair the current Azure Stack HCI registration with the cloud. This cmdlet deletes the local certificates on the clustered nodes and the remote certificates in the Azure AD application in the cloud and generates new replacement certificates for both. The resource group, resource name, and other registration choices are preserved.

    .PARAMETER UseDeviceAuthentication

    Use device code authentication instead of an interactive browser prompt.

    .PARAMETER Credential

    Specifies the credential for the ComputerName. Default is the current user executing the Cmdlet.

    .PARAMETER IsWAC

    Registrations through Windows Admin Center specifies this parameter to true.

    .PARAMETER ArcServerResourceGroupName

    Specifies the Arc Resource Group name. If not specified, cluster resource group name will be used.

     .PARAMETER ArcSpnCredential

    Specifies the credentials to be used for onboarding ARC agent. If not specified, new set of credentials will be generated.

    .OUTPUTS

    PSCustomObject. Returns following Properties in PSCustomObject

    Result: Success or Failed or Cancelled.

    ResourceId: Resource ID of the resource created in Azure.

    PortalResourceURL: Azure Portal Resource URL.

    .EXAMPLE

    Invoking on one of the cluster node.

    C:\PS>Register-AzStackHCI -SubscriptionId "12a0f531-56cb-4340-9501-257726d741fd" -Region "eastus"

    Result: Success

    ResourceId: /subscriptions/12a0f531-56cb-4340-9501-257726d741fd/resourceGroups/DemoHCICluster1-rg/providers/Microsoft.AzureStackHCI/clusters/DemoHCICluster1

    PortalResourceURL: https://portal.azure.com/#@c31c0dbb-ce27-4c78-ad26-a5f717c14557/resource/subscriptions/12a0f531-56cb-4340-9501-257726d741fd/resourceGroups/DemoHCICluster1-rg/providers/Microsoft.AzureStackHCI/clusters/DemoHCICluster1/overview

    .EXAMPLE

    Invoking from the management node

    C:\PS>Register-AzStackHCI -SubscriptionId "12a0f531-56cb-4340-9501-257726d741fd" -ComputerName ClusterNode1 -Region "eastus"

    Result: Success

    ResourceId: /subscriptions/12a0f531-56cb-4340-9501-257726d741fd/resourceGroups/DemoHCICluster2-rg/providers/Microsoft.AzureStackHCI/clusters/DemoHCICluster2

    PortalResourceURL: https://portal.azure.com/#@c31c0dbb-ce27-4c78-ad26-a5f717c14557/resource/subscriptions/12a0f531-56cb-4340-9501-257726d741fd/resourceGroups/DemoHCICluster2-rg/providers/Microsoft.AzureStackHCI/clusters/DemoHCICluster2/overview

    .EXAMPLE

    Invoking from WAC

    C:\PS>Register-AzStackHCI -SubscriptionId "12a0f531-56cb-4340-9501-257726d741fd" -ArmAccessToken etyer..ere= -AccountId user1@corp1.com -Region westus -ResourceName DemoHCICluster3 -ResourceGroupName DemoHCIRG

    Result: Success

    ResourceId: /subscriptions/12a0f531-56cb-4340-9501-257726d741fd/resourceGroups/DemoHCIRG/providers/Microsoft.AzureStackHCI/clusters/DemoHCICluster3

    PortalResourceURL: https://portal.azure.com/#@c31c0dbb-ce27-4c78-ad26-a5f717c14557/resource/subscriptions/12a0f531-56cb-4340-9501-257726d741fd/resourceGroups/DemoHCIRG/providers/Microsoft.AzureStackHCI/clusters/DemoHCICluster3/overview

    .EXAMPLE

    Invoking with all the parameters

    C:\PS>Register-AzStackHCI -SubscriptionId "12a0f531-56cb-4340-9501-257726d741fd" -Region westus -ResourceName HciCluster1 -TenantId "c31c0dbb-ce27-4c78-ad26-a5f717c14557" -ResourceGroupName HciRG -ArcServerResourceGroupName HciRG -ArmAccessToken eerrer..ere= -AccountId user1@corp1.com -EnvironmentName AzureCloud -ComputerName node1hci -Credential Get-Credential    

    Result: Success

    ResourceId: /subscriptions/12a0f531-56cb-4340-9501-257726d741fd/resourceGroups/HciRG/providers/Microsoft.AzureStackHCI/clusters/HciCluster1

    PortalResourceURL: https://portal.azure.com/#@c31c0dbb-ce27-4c78-ad26-a5f717c14557/resource/subscriptions/12a0f531-56cb-4340-9501-257726d741fd/resourceGroups/HciRG/providers/Microsoft.AzureStackHCI/clusters/HciCluster1/overview

#>

function Register-AzStackHCI{

[CmdletBinding(SupportsShouldProcess, ConfirmImpact = 'High')]

param(

    [Parameter(Mandatory = $true)]

    [string] $SubscriptionId,

    [Parameter(Mandatory = $true)]

    [string] $Region,

    [Parameter(Mandatory = $false)]

    [string] $ResourceName,

    [Parameter(Mandatory = $false)]

    [System.Collections.Hashtable] $Tag,

    [Parameter(Mandatory = $false)]

    [string] $TenantId,

    [Parameter(Mandatory = $false)]

    [string] $ResourceGroupName,

    [Parameter(Mandatory = $false)]

    [string] $ArmAccessToken,

    [Parameter(Mandatory = $false)]

    [string] $AccountId,

    [Parameter(Mandatory = $false)]

    [string] $EnvironmentName = $AzureCloud,

    [Parameter(Mandatory = $false)]

    [string] $ComputerName,

    [Parameter(Mandatory = $false)]

    [string] $CertificateThumbprint,

    [Parameter(Mandatory = $false)]

    [Switch]$RepairRegistration,

    [Parameter(Mandatory = $false)]

    [Switch]$UseDeviceAuthentication,

    [Parameter(Mandatory = $false)]

    [System.Management.Automation.PSCredential] $Credential, 

    [Parameter(Mandatory = $false)]

    [Switch]$IsWAC,

    [Parameter(Mandatory = $false)]

    [string] $ArcServerResourceGroupName,

    [Parameter(Mandatory = $false)]

    [System.Management.Automation.PSCredential] $ArcSpnCredential

    )

    if([string]::IsNullOrEmpty($ComputerName))

    {

        $ComputerName = [Environment]::MachineName

        $IsManagementNode = $False

    }

    else

    {

        $IsManagementNode = $True

    }

    try

    {

        Setup-Logging -LogFilePrefix "RegisterHCI" -DebugEnabled ($DebugPreference -ne "SilentlyContinue")

        $registrationOutput = New-Object -TypeName PSObject

        $operationStatus = [OperationStatus]::Unused

        Show-LatestModuleVersion

        Write-Progress -Id $MainProgressBarId -activity $RegisterProgressActivityName -status $CheckingDependentModules -percentcomplete 1

        Check-DependentModules

        Write-Progress -Id $MainProgressBarId -activity $RegisterProgressActivityName -status $FetchingRegistrationState -percentcomplete 2

        if($IsManagementNode)

        {

            Write-VerboseLog ("Connecting via Management Node")

            if($Credential -eq $Null)

            {

                Write-VerboseLog ("Connecting without credentials")

                $clusterNodeSession = New-PSSession -ComputerName $ComputerName

            }

            else

            {

                Write-VerboseLog ("Connecting to $ComputerName with credentials")

                $clusterNodeSession = New-PSSession -ComputerName $ComputerName -Credential $Credential

            }

        }

        else

        {

            $clusterNodeSession = New-PSSession -ComputerName localhost

        }

        $msg = Print-FunctionParameters -Message "Register-AzStackHCI" -Parameters $PSBoundParameters

        Write-NodeEventLog -Message $msg  -EventID 9009 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName

        $RegContext = Invoke-Command -Session $clusterNodeSession -ScriptBlock { Get-AzureStackHCI }

            if(-Not ([string]::IsNullOrEmpty($RegContext.AzureResourceUri)))

            {

                if([string]::IsNullOrEmpty($ResourceName))

                {

                    $ResourceName = $RegContext.AzureResourceUri.Split('/')[8]

                    Write-VerboseLog ("resolved resource Name $ResourceName from registration context")

                }

                elseif ($ResourceName -ne $RegContext.AzureResourceUri.Split('/')[8]) 

                {

                    Write-ErrorLog -Message ($HCIResourceNameDifferentErrorMessage -f $RegContext.AzureResourceUri.Split('/')[8]) -ErrorAction Continue

                    $registrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyResult -Value [OperationStatus]::Failed

                    Write-Output $registrationOutput | Format-List

                    Write-NodeEventLog -Message ($HCIResourceNameDifferentErrorMessage -f $RegContext.AzureResourceUri.Split('/')[8]) -EventID 9127 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName -Level Warning

                    throw

                }

                if([string]::IsNullOrEmpty($ResourceGroupName))

                {

                    $ResourceGroupName = $RegContext.AzureResourceUri.Split('/')[4]

                    Write-VerboseLog ("resolved resource group name $ResourceGroupName from registration context")

                }

                elseif ($ResourceGroupName -ne $RegContext.AzureResourceUri.Split('/')[4]) 

                {

                    Write-ErrorLog -Message ($HCIResourceGroupNameDifferentErrorMessage -f $RegContext.AzureResourceUri.Split('/')[4]) -Category OperationStopped -ErrorAction Continue

                    $registrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyResult -Value [OperationStatus]::Failed

                    Write-Output $registrationOutput | Format-List

                    Write-NodeEventLog -Message ($HCIResourceGroupNameDifferentErrorMessage -f $RegContext.AzureResourceUri.Split('/')[4]) -EventID 9125 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName -Level Warning

                    throw

                }

                if($SubscriptionId -ne $RegContext.AzureResourceUri.Split('/')[2])

                {

                    Write-ErrorLog -Message ($HCISubscriptionDifferentErrorMessage -f $RegContext.AzureResourceUri.Split('/')[2]) -ErrorAction Continue

                    $registrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyResult -Value [OperationStatus]::Failed

                    Write-Output $registrationOutput | Format-List

                    Write-NodeEventLog -Message ($HCISubscriptionDifferentErrorMessage -f $RegContext.AzureResourceUri.Split('/')[2]) -EventID 9128 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName -Level Warning

                    throw

                }

            }

        elseif ($RepairRegistration -eq $true)

        {

            Write-ErrorLog -Message $NoExistingRegistrationExistsErrorMessage -Category OperationStopped -ErrorAction Continue

            $registrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyResult -Value [OperationStatus]::Failed

            Write-Output $registrationOutput | Format-List

            Write-NodeEventLog -Message $NoExistingRegistrationExistsErrorMessage -EventID 9101 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName -Level Warning

            throw

        }

        Write-Progress -Id $MainProgressBarId -activity $RegisterProgressActivityName -status $InstallRSATClusteringMessage -percentcomplete 4

        $clusScript = {

                $clusterPowershell = Get-WindowsFeature -Name RSAT-Clustering-PowerShell;

                if ( $clusterPowershell.Installed -eq $false)

                {

                    Install-WindowsFeature RSAT-Clustering-PowerShell | Out-Null;

                }

        }

        Write-Progress -Id $MainProgressBarId -activity $RegisterProgressActivityName -status $ValidatingParametersFetchClusterName -percentcomplete 8;

        Write-VerboseLog ("installing RSAT-Clustering-PowerShell module on the cluster")

        Invoke-Command -Session $clusterNodeSession -ScriptBlock $clusScript

        Write-VerboseLog ("invoking Get-Cluster module on the cluster")

        $getCluster = Invoke-Command -Session $clusterNodeSession -ScriptBlock { Get-Cluster }

        Write-VerboseLog ("invoking Get-ClusterNode module on the cluster")

        $clusterNodes = Invoke-Command -Session $clusterNodeSession -ScriptBlock { Get-ClusterNode }

        $clusterDNSSuffix = Get-ClusterDNSSuffix -Session $clusterNodeSession

        Write-VerboseLog ("clusterDNSSuffix resolved to:  $clusterDNSSuffix")

        $clusterDNSName = Get-ClusterDNSName -Session $clusterNodeSession

        Write-VerboseLog ("clusterDNSName resolved to:  $clusterDNSName")

        if([string]::IsNullOrEmpty($ResourceName))

        {

            if($getCluster -eq $Null)

            {

                $NoClusterErrorMessage = $NoClusterError -f $ComputerName

                Write-ErrorLog -Message $NoClusterErrorMessage -Category OperationStopped -ErrorAction Continue

                $registrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyResult -Value [OperationStatus]::Failed

                Write-Output $registrationOutput | Format-List

                Write-NodeEventLog -Message $NoClusterErrorMessage -EventID 9102 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName -Level Warning

                throw

            }

            else

            {

                $ResourceName = $getCluster.Name

                Write-VerboseLog ("using cluster Name as resource name: {0}" -f $ResourceName)

            }

        }

        if([string]::IsNullOrEmpty($ResourceGroupName))

        {

            $ResourceGroupName = $ResourceName + "-rg"

            Write-VerboseLog ("using cluster Name as resourcegroup name: $ResourceGroupName")

        }

        $Region = Normalize-RegionName -Region $Region

        Write-VerboseLog ("Normailzed region string: $Region")

        $TenantId = Azure-Login -SubscriptionId $SubscriptionId -TenantId $TenantId -ArmAccessToken $ArmAccessToken -GraphAccessToken $GraphAccessToken -AccountId $AccountId -EnvironmentName $EnvironmentName -ProgressActivityName $RegisterProgressActivityName -UseDeviceAuthentication $UseDeviceAuthentication -Region $Region

        $resourceId = Get-ResourceId -ResourceName $ResourceName -SubscriptionId $SubscriptionId -ResourceGroupName $ResourceGroupName

        Write-VerboseLog ("ResourceId of cluster resource: $resourceId")

        $resource = Get-AzResource -ResourceId $resourceId -ApiVersion $RPAPIVersion -ErrorAction Ignore

        $resGroup = Get-AzResourceGroup -Name $ResourceGroupName -ErrorAction Ignore

        if($resource -ne $null)

        {

            Write-VerboseLog ("Cluster resource is already created")

            # Fetching Arc settings resource

            $arcResourceId = $resourceId + $HCIArcInstanceName

            $arcres = Get-AzResource -ResourceId $arcResourceId -ApiVersion $HCIArcAPIVersion -ErrorAction Ignore

            # Setting the value for ArcServerResourceGroupName

            if ([string]::IsNullOrEmpty($ArcServerResourceGroupName)) 

            {

                if($null -ne $arcres)

                {

                    $ArcServerResourceGroupName = $arcres.Properties.arcInstanceResourceGroup

                    Write-VerboseLog ("Arc for servers resource already exist. Resolved Arc for servers Resource group name from Arc for servers resource: $ArcServerResourceGroupName")

                }

                # Use Cluster RG as Arc RG if Arc RG is empty and Arc settings is not set

                else

                {

                    $ArcServerResourceGroupName = $resourceGroupName

                    Write-VerboseLog ("Using Cluster Resource group as Arc for Servers Resource group name: $ArcServerResourceGroupName")

                }

            }

            else 

            {

                if (($null -ne $arcres) -and ($arcres.Properties.arcInstanceResourceGroup -ne $ArcServerResourceGroupName))

                {

                    $ArcAlreadyRegisteredInDifferentResourceGroupErrorMessage = $ArcAlreadyRegisteredInDifferentResourceGroupError -f $arcres.Properties.arcInstanceResourceGroup

                    Write-ErrorLog -Message $ArcAlreadyRegisteredInDifferentResourceGroupErrorMessage -ErrorAction Continue

                    $registrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyResult -Value [OperationStatus]::Failed

                    $registrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyDetails -Value $ArcAlreadyRegisteredInDifferentResourceGroupErrorMessage

                    Write-Output $registrationOutput | Format-List

                    Write-NodeEventLog -Message $ArcAlreadyRegisteredInDifferentResourceGroupErrorMessage -EventID 9129 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName -Level Warning 

                    throw

                }

            }

            $resourceLocation = Normalize-RegionName -Region $resource.Location

            Write-VerboseLog ("Location resolved from  cloud resource: $resourceLocation")

            if($Region -ne $resourceLocation)

            {

                $ResourceExistsInDifferentRegionErrorMessage = $ResourceExistsInDifferentRegionError -f $resourceLocation, $Region

                Write-ErrorLog -Message $ResourceExistsInDifferentRegionErrorMessage -Category OperationStopped -ErrorAction Continue

                $registrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyResult -Value [OperationStatus]::Failed

                Write-Output $registrationOutput | Format-List

                Write-NodeEventLog -Message $ResourceExistsInDifferentRegionErrorMessage -EventID 9104 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName -Level Warning

                throw

            }

        }

        # Check if OS version is 22H2 or newer

        $osVersionDetectoid       = { $displayVersion = (Get-ItemProperty -Path "HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion").DisplayVersion; $buildNumber = (Get-CimInstance -ClassName CIM_OperatingSystem).BuildNumber; New-Object -TypeName PSObject -Property @{'DisplayVersion'=$displayVersion; 'BuildNumber'=$buildNumber} }

        $cloudManagementDetectoid = { $cloudManagementSvc = Get-Item -Path ("{0}\System32\azshci\{1}.exe" -f $env:SystemRoot, $Using:ClusterAgentServiceName) -ErrorAction SilentlyContinue; $cloudManagementSvc -ne $null }

        $cloudManagementInfraDetectoid = { $cloudManagementInfraSvc = Get-Item -Path ("{0}\System32\azshci\cloudmanagement\{1}.exe" -f $env:SystemRoot, $Using:CloudManagementInfraServiceName) -ErrorAction SilentlyContinue; $cloudManagementInfraSvc -ne $null }

        $osVersionInfo                  = Invoke-Command -Session $clusterNodeSession -ScriptBlock $osVersionDetectoid

        $cloudManagementCapable         = Invoke-Command -Session $clusterNodeSession -ScriptBlock $cloudManagementDetectoid

        $cloudManagementInfraCapable    = Invoke-Command -Session $clusterNodeSession -ScriptBlock $cloudManagementInfraDetectoid

        Write-VerboseLog ("Display Version: {0}, Build Number: {1}, Cloud Management capable: {2}" -f $osVersionInfo.DisplayVersion, $osVersionInfo.BuildNumber, $cloudManagementCapable)

        $isCloudManagementSupported = ([Int]::Parse($osVersionInfo.BuildNumber) -ge $22H2BuildNumber) -and ($cloudManagementCapable -eq $true)

        $isCloudManagementInfraSupported = ([Int]::Parse($osVersionInfo.BuildNumber) -ge $23H2BuildNumber) -and ($cloudManagementInfraCapable -eq $true)

        $isDefaultExtensionSupported = ([Int]::Parse($osVersionInfo.BuildNumber) -ge $23H2BuildNumber)

        Write-VerboseLog ("Cloud Management supported: {0}" -f $isCloudManagementSupported)

        Write-VerboseLog ("Cloud Management Infra supported: {0}" -f $isCloudManagementInfraSupported)

        Write-VerboseLog ("Installing Mandatory extensions supported: {0}" -f $isDefaultExtensionSupported)

        if(($isDefaultExtensionSupported) -and (($null -eq $arcres) -or ($null -eq $arcres.Properties.DefaultExtensions.ConsentTime)))

        {

            if($PSCmdlet.ShouldProcess($DefaultExtensionPromptMessage, $DefaultExtensionPromptMessage, "Do you want to continue?"))

            {

                Write-VerboseLog ("User has consented to install mandatory Azure Arc extensions. Continuing with registration.")                        

            }

            else

            {

                Write-VerboseLog ("User has declined to install Mandatory Azure Arc extensions. Registration is not possible without a consent to install Mandatory extensions. Aborting registration.")  

                Write-ErrorLog -Message $DefaultExtensionErrorMessage                      

                throw

            }

        }

        #USE CLUSTER RG AS ARC RG

        if ([string]::IsNullOrEmpty($ArcServerResourceGroupName)) 

        {

            $ArcServerResourceGroupName = $resourceGroupName

            Write-VerboseLog ("using cluster rg as arcserver resourcegroup name: $ResourceGroupName")

        }

        try

        {

            Verify-NodesArcRegistrationState -ClusterNodes $clusterNodes -SubscriptionId $SubscriptionId -ArcResourceGroupName $ArcServerResourceGroupName -Credential $Credential -ClusterDNSSuffix $clusterDNSSuffix

        }

        catch

        {

            Write-ErrorLog $_.Exception.Message -Category OperationStopped

            $registrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyResult -Value [OperationStatus]::Failed

            Write-Output $registrationOutput | Format-List

            throw

        }

        $arcResGroup = Get-AzResourceGroup -Name $ArcServerResourceGroupName -ErrorAction Ignore

        $registrationBeginMsg="Register-AzStackHCI triggered - Region: $Region ResourceName: $ResourceName `

        SubscriptionId: $SubscriptionId Tenant: $TenantId ResourceGroupName: $ResourceGroupName `

        AccountId: $AccountId EnvironmentName: $EnvironmentName CertificateThumbprint: $CertificateThumbprint `

        RepairRegistration: $RepairRegistration IsWAC: $IsWAC `

        ArcServerResourceGroupName: $ArcServerResourceGroupName"

        $registrationBeginMsgPIIScrubbed="Register-AzStackHCI triggered - Region: $Region ResourceName: $ResourceName `

        SubscriptionId: $SubscriptionId Tenant: $TenantId ResourceGroupName: $ResourceGroupName `

        EnvironmentName: $EnvironmentName CertificateThumbprint: $CertificateThumbprint `

        RepairRegistration: $RepairRegistration IsWAC: $IsWAC `

        ArcServerResourceGroupName: $ArcServerResourceGroupName"

        Write-VerboseLog ($registrationBeginMsg)

        Write-NodeEventLog -Message $registrationBeginMsgPIIScrubbed -EventID 9001 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName

        if ($Null -ne $arcResGroup)

        {

            Write-VerboseLog("Checking if an arc machine with same name as current nodes already exists in the Arc For Server Resource Group")

            forEach ($clusNode in $clusterNodes) 

            {

                $machineResourceId = "/Subscriptions/" + $SubscriptionId + "/resourceGroups/" + $ArcServerResourceGroupName + "/providers/Microsoft.HybridCompute/machines/" + $clusNode

                $machineResourceIdWithAPI = "{0}?api-version={1}" -f $machineResourceId, $HCApiVersion

                $arcMachineResource = Get-AzResource -ResourceId $machineResourceIdWithAPI -ErrorAction Ignore

                $sameNodeNames = [System.Collections.ArrayList]::new()

                if ($Null -ne $arcMachineResource) 

                {

                    $parentClusterResourceId = $arcMachineResource.properties.parentClusterResourceId

                    #If ParentClusterResourceId is empty, Arc enablement happened before Registration. 

                    if ([string]::IsNullOrEmpty($parentClusterResourceId)) 

                    {

                        Write-VerboseLog("ParentClusterResourceId for Node $clusNode is empty, continue.")

                        continue

                    }

                    #Case: ParentClusterResourceId is Set. 

                    else 

                    {

                        $errorMessage = "Cluster is {} and ParentClusterResourceId for $clusNode does not match the Cluster Resource."

                        # If Cluster is registered from before, then ParentClusterResourceId should match the clusterResourceId 

                        if ($RegContext.RegistrationStatus -eq [RegistrationStatus]::Registered) 

                        {

                            if ($parentClusterResourceId -eq $resourceId) 

                            {

                                Write-VerboseLog ("Cluster is registered and ParentClusterResourceId for $clusNode matches the Cluster Resource, continue.")

                                continue

                            }

                            else 

                            {

                                $errorMessageLog = $errorMessage -f "registered"

                                Write-ErrorLog($errorMessageLog)

                                $sameNodeNames.Add($clusNode) | Out-Null

                            }

                        }

                        #If Cluster is not yet registered, then ParentClusterResourceId should be Null 

                        else 

                        {

                            $errorMessageLog = $errorMessage -f "not registered"

                            Write-ErrorLog ($errorMessageLog)

                            $sameNodeNames.Add($clusNode) | Out-Null

                        }

                    }

                }

            }

            if ($sameNodeNames.Count -gt 0) 

            {

                Write-VerboseLog("A node exists with the same name in the arc for servers resource group. Choose a different resource group for Arc for server resources.")

                $sameNodeNamesAsList = $sameNodeNames -join ","

                $ArcMachineAlreadyExistsInResourceGroupErrorMessage = $ArcMachineAlreadyExistsInResourceGroupError -f $sameNodeNamesAsList, $ArcServerResourceGroupName

                Write-ErrorLog -Message $ArcMachineAlreadyExistsInResourceGroupErrorMessage -ErrorAction Continue

                $registrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyResult -Value [OperationStatus]::Failed

                $registrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyDetails -Value $ArcMachineAlreadyExistsInResourceGroupErrorMessage 

                Write-Output $registrationOutput | Format-List

                Write-NodeEventLog -Message $ArcMachineAlreadyExistsInResourceGroupErrorMessage -EventID 9105 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName -Level Warning

                throw

            }

        }

        if ($arcResGroup -eq $Null) 

        {

            $CreatingResourceGroupMessageProgress = $CreatingResourceGroupMessage -f $ArcServerResourceGroupName

            Write-VerboseLog ("$CreatingResourceGroupMessageProgress")

            $arcResGroup = New-AzResourceGroup -Name $ArcServerResourceGroupName -Location $Region -Tag @{$ResourceGroupCreatedByName = $ResourceGroupCreatedByValue }

        }

        $resGroup = Get-AzResourceGroup -Name $ResourceGroupName -ErrorAction Ignore

        # Normalize region name

        $Region = Normalize-RegionName -Region $Region

        $portalResourceUrl = Get-PortalHCIResourcePageUrl -TenantId $TenantId -EnvironmentName $EnvironmentName -SubscriptionId $SubscriptionId -ResourceGroupName $ResourceGroupName -ResourceName $ResourceName -Region $Region

        if(($RegContext.RegistrationStatus -eq [RegistrationStatus]::Registered) -and ($RepairRegistration -eq $false))

        {

            if(($RegContext.AzureResourceUri -eq $resourceId))

            {

                if($resource -ne $Null)

                {

                    Write-VerboseLog ("Cluster is already registered with same resourceID. Nothing to do.")

                    # Already registered with same resource Id and resource exists

                    $appId = $resource.Properties.aadClientId

                    $operationStatus = [OperationStatus]::Success

                }

                else

                {

                    Write-VerboseLog ("Cluster is already registered but the cloud resource does not exist.")

                    # Already registered with same resource Id and resource does not exists

                    $AlreadyRegisteredErrorMessage = $CloudResourceDoesNotExist -f $resourceId

                    Write-ErrorLog -Message $AlreadyRegisteredErrorMessage -Category OperationStopped -ErrorAction Continue

                    $registrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyResult -Value [OperationStatus]::Failed

                    Write-Output $registrationOutput | Format-List

                    Write-NodeEventLog -Message $AlreadyRegisteredErrorMessage -EventID 9106 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName -Level Warning

                    throw

                }

            }

            else # Already registered with different resource Id

            {

                Write-VerboseLog ("Cluster is already registered and cloud resource does not match.")

                $AlreadyRegisteredErrorMessage = $RegisteredWithDifferentResourceId -f $RegContext.AzureResourceUri

                Write-ErrorLog -Message $AlreadyRegisteredErrorMessage -Category OperationStopped -ErrorAction Continue

                $registrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyResult -Value [OperationStatus]::Failed

                Write-Output $registrationOutput | Format-List

                Write-NodeEventLog -Message $AlreadyRegisteredErrorMessage -EventID 9107 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName -Level Warning

                throw

            }

        }

        else

        {

            Write-VerboseLog ("$RegisterProgressActivityName")

            Write-Progress -Id $MainProgressBarId -activity $RegisterProgressActivityName -status $RegisterAzureStackRPMessage -percentcomplete 40

            Register-ResourceProviderIfRequired -ProviderNamespace "Microsoft.AzureStackHCI"

            # Validate that the input region is supported by the Stack HCI RP

            $supportedRegions = [string]::Empty

            $regionSupported = Validate-RegionName -Region $Region -SupportedRegions ([ref]$supportedRegions)

            if ($regionSupported -eq $False)

            {

                $RegionNotSupportedMessage = $RegionNotSupported -f $Region, $supportedRegions

                Write-ErrorLog -Message $RegionNotSupportedMessage -Category OperationStopped -ErrorAction Continue

                $registrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyResult -Value [OperationStatus]::Failed

                Write-Output $registrationOutput | Format-List

                Write-NodeEventLog -Message $RegionNotSupportedMessage -EventID 9108 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName -Level Warning

                throw

            }

            if($Null -eq $resource)

            {

                # Create new HCI resource by calling RP

                if($Null -eq $resGroup)

                {

                    $CreatingResourceGroupMessageProgress = $CreatingResourceGroupMessage -f $ResourceGroupName

                    Write-VerboseLog ("$CreatingResourceGroupMessageProgress")

                    Write-Progress -Id $MainProgressBarId -activity $RegisterProgressActivityName -status $CreatingResourceGroupMessageProgress -percentcomplete 55

                    $resGroup = New-AzResourceGroup -Name $ResourceGroupName -Location $Region -Tag @{$ResourceGroupCreatedByName = $ResourceGroupCreatedByValue }

                }

                $CreatingCloudResourceMessageProgress = $CreatingCloudResourceMessage -f $ResourceName

                Write-Progress -Id $MainProgressBarId -activity $RegisterProgressActivityName -status $CreatingCloudResourceMessageProgress -percentcomplete 60

                $properties = [ResourceProperties]::new($Region, @{}, $Tag)

                $payload = ConvertTo-Json -InputObject $properties

                $resourceIdWithAPI = "{0}?api-version={1}" -f $resourceId, $RPAPIVersion

                Write-VerboseLog ("$CreatingCloudResourceMessageProgress with properties : {0}" -f ($payload | Out-String))

                Write-VerboseLog ("ResorceIdWithApi: $resourceIdWithAPI")

                $clusterResult = New-ClusterWithRetries -ResourceIdWithAPI $resourceIdWithAPI -Payload $payload

                if($clusterResult -eq $false) 

                {

                    Write-ErrorLog -Message $ClusterCreationFailureMessage -ErrorAction Continue

                    $registrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyResult -Value [OperationStatus]::Failed

                    Write-Output $registrationOutput | Format-List

                    Write-NodeEventLog -Message $ClusterCreationFailureMessage -EventID 9130 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName -Level Warning

                    throw

                }

                $resource = Get-AzResource -ResourceId $resourceId -ApiVersion $RPAPIVersion -ErrorAction Ignore

            }

            if((($Null -eq $resource.Identity) -or ($resource.Identity.Type -ne "SystemAssigned")))

            {

                #we are here, if we are in repairregistration flow and resource might have been already created, we will check if MSI is not enabled, if it is not enabled, we will patch the resource again.

                $RepairingCloudResourceMessageProgress = $RepairingCloudResourceMessage -f $ResourceName

                Write-Progress -Id $MainProgressBarId -activity $RegisterProgressActivityName -status $RepairingCloudResourceMessageProgress -percentcomplete 60

                Write-VerboseLog ("Enabling SystemAssignedIdentity on : $resourceId")

                $properties = New-Object -TypeName PSObject

                $properties | Add-Member -MemberType NoteProperty -Name "identity" -Value $([Identity]::new())

                if ($Tag.Count -ne 0)

                {

                    $properties | Add-Member -MemberType NoteProperty -Name "tags" -Value $Tag

                }

                $payload = ConvertTo-Json -InputObject $properties

                $resourceIdWithAPI = "{0}?api-version={1}" -f $resourceId, $RPAPIVersion

                Write-VerboseLog ("$CloudResourceMessageProgress with properties : {0}" -f ($payload | Out-String))

                Write-VerboseLog ("ResorceIdWithApi: $resourceIdWithAPI")

                $response = Invoke-AzRestMethod -Path $resourceIdWithAPI -Method PATCH -Payload $payload

                if(-not(($response.StatusCode -ge 200) -and ($response.StatusCode -lt 300)))

                {

                    Write-ErrorLog -Message ("Failed to repair ARM resource representing the cluster. Code: {0}, Details: {1}" -f $response.StatusCode, $response.Content) -Category OperationStopped

                    throw

                }

                $resource = Get-AzResource -ResourceId $resourceId -ApiVersion $RPAPIVersion -ErrorAction Ignore

            }

            if($resource.Properties.aadApplicationObjectId -eq $Null)

            {

                # create cluster identity by calling HCI RP

                $clusterIdentity = Execute-Without-ProgressBar -ScriptBlock { Invoke-AzResourceAction -ResourceId $resourceId -ApiVersion $RPAPIVersion -Action createClusterIdentity -Force }

                # Get cluster again for identity details

                $resource = Get-AzResource -ResourceId $resourceId -ApiVersion $RPAPIVersion -ErrorAction Ignore

            }

            # if the RPObjectId is null, we will do a patch call on the resource. Case: cluster was created before RPObjectId was introduced 

            if($Null -eq $resource.Properties.ResourceProviderObjectId)

            {

                Write-VerboseLog("Populating Resource Provider Object Id for cluster: $resourceId")

                $properties = @{}

                $payload = ConvertTo-Json -InputObject $properties

                $resourceIdWithAPI = "{0}?api-version={1}" -f $resourceId, $RPAPIVersion

                Write-VerboseLog ("Patching Cloud Resource with properties : {0}" -f ($payload | Out-String))

                Write-VerboseLog ("ResourceIdWithApi: $resourceIdWithAPI")

                Invoke-AzRestMethod -Path $ResourceIdWithAPI -Method PATCH -Payload $Payload

                $resource = Get-AzResource -ResourceId $resourceId -ApiVersion $RPAPIVersion -ErrorAction Ignore

            }

            if ($Null -eq $resource.Properties.ResourceProviderObjectId) 

            {

                Write-VerboseLog("Resource Provider Object Id is Null. Can't assign roles to HCI RP for ARC Onboarding")

                Write-ErrorLog -Message $rpObjectIdNullError -Category OperationStopped

                $operationStatus = [OperationStatus]::ArcFailed

                $registrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyErrorDetail -Value [ErrorDetail]::ArcPermissionsMissing

                Write-NodeEventLog -Message $rpObjectIdNullError -EventID 9131 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName -Level Error

                throw

            }

            $RPObjectId = $resource.Properties.ResourceProviderObjectId

            $setRolesResult = Set-ArcRoleforRPSpn -RPObjectId $RPObjectId -ArcServerResourceGroupName $ArcServerResourceGroupName

            if($setRolesResult -ne [ErrorDetail]::Success) 

            {

                Write-VerboseLog("Failed to assign Arc roles to HCI Resource Provider")

                Write-ErrorLog -Message $roleAssignmentHCIRPFailError -Category OperationStopped

                $operationStatus = [OperationStatus]::ArcFailed

                $registrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyErrorDetail -Value $setRolesResult

                Write-NodeEventLog -Message $rpObjectIdNullError -EventID 9132 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName -Level Error

                throw

            }

            $serviceEndpoint = $resource.properties.serviceEndpoint

            $appId = $resource.Properties.aadClientId

            $cloudId = $resource.Properties.cloudId 

            $objectId = $resource.Properties.aadApplicationObjectId

            $spObjectId = $resource.Properties.aadServicePrincipalObjectId

            # Add certificate

            Write-Progress -Id $MainProgressBarId -activity $RegisterProgressActivityName -status $GettingCertificateMessage -percentcomplete 70

            $CertificatesToBeMaintained = @{}

            $NewCertificateFailedNodes = [System.Collections.ArrayList]::new()

            $SetCertificateFailedNodes = [System.Collections.ArrayList]::new()

            $OSNotLatestOnNodes = [System.Collections.ArrayList]::new()

            $TempServiceEndpoint = ""

            $Authority = ""

            $BillingServiceApiScope = ""

            $GraphServiceApiScope = ""

            Get-EnvironmentEndpoints -EnvironmentName $EnvironmentName -ServiceEndpoint ([ref]$TempServiceEndpoint ) -Authority ([ref]$Authority) -BillingServiceApiScope ([ref]$BillingServiceApiScope) -GraphServiceApiScope ([ref]$GraphServiceApiScope)

            $setupCertsError = Setup-Certificates -ClusterNodes $clusterNodes -Credential $Credential -ResourceName $ResourceName -ObjectId $objectId -CertificateThumbprint $CertificateThumbprint -AppId $appId -TenantId $TenantId -CloudId $cloudId `

                                -ServiceEndpoint $ServiceEndpoint -BillingServiceApiScope $BillingServiceApiScope -GraphServiceApiScope $GraphServiceApiScope -Authority $Authority -NewCertificateFailedNodes $NewCertificateFailedNodes `

                                -SetCertificateFailedNodes $SetCertificateFailedNodes -OSNotLatestOnNodes $OSNotLatestOnNodes -CertificatesToBeMaintained $CertificatesToBeMaintained -ClusterDNSSuffix $clusterDNSSuffix -ResourceId $resourceId

            Write-VerboseLog ("Setup-Certificates returned {0}" -f $setupCertsError)

            if($null -ne $setupCertsError)

            {

                Write-VerboseLog ("Setup-Certificates has failed")

                Write-ErrorLog -Message $setupCertsError -Category OperationStopped

                $registrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyResult -Value [OperationStatus]::Failed

                Write-Output $registrationOutput | Format-List

                Write-NodeEventLog -Message $setupCertsError -EventID 9109 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName -Level Warning

                throw

            }

            if(($SetCertificateFailedNodes.Count -ge 1) -or ($NewCertificateFailedNodes.Count -ge 1))

            {

                Write-VerboseLog ("Setup-Certificates failed on atleast one node")

                $SettingCertificateFailedMessage = $SettingCertificateFailed -f ($NewCertificateFailedNodes -join ","),($SetCertificateFailedNodes -join ",")

                Write-ErrorLog -Message $SettingCertificateFailedMessage -Category OperationStopped -ErrorAction Continue

                $registrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyResult -Value [OperationStatus]::Failed

                Write-Output $registrationOutput | Format-List

                Write-NodeEventLog -Message $SettingCertificateFailedMessage -EventID 9110 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName -Level Warning

                throw

            }

            if($OSNotLatestOnNodes.Count -ge 1)

            {

                $NotAllTheNodesInClusterAreGAError = $NotAllTheNodesInClusterAreGA -f ($OSNotLatestOnNodes -join ",")

                Write-ErrorLog -Message $NotAllTheNodesInClusterAreGAError -Category OperationStopped -ErrorAction Continue

                $registrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyResult -Value [OperationStatus]::Failed

                Write-Output $registrationOutput | Format-List

                Write-NodeEventLog -Message $NotAllTheNodesInClusterAreGAError -EventID 9111 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName -Level Warning

                throw

            }

            Write-Progress -Id $MainProgressBarId -activity $RegisterProgressActivityName -status $RegisterAndSyncMetadataMessage -percentcomplete 90

            # Register by calling on-prem usage service Cmdlet

            try 

            {

                $Params = @{

                    ServiceEndpoint = $ServiceEndpoint

                    BillingServiceApiScope = $BillingServiceApiScope

                    GraphServiceApiScope = $GraphServiceApiScope

                    AADAuthority = $Authority

                    AppId = $appId

                    TenantId = $TenantId

                    CloudId = $cloudId

                    SubscriptionId = $SubscriptionId

                    ObjectId = $objectId

                    ResourceName = $ResourceName

                    ProviderNamespace = "Microsoft.AzureStackHCI"

                    ResourceArmId = $resourceId

                    ServicePrincipalClientId = $spObjectId

                    CertificateThumbprint = $CertificateThumbprint

                }

                $SetAzureStackHCIRegistrationScript = {

                    Set-AzureStackHCIRegistration -ErrorAction Stop @Params

                }

                Run-InvokeCommand -ScriptBlock $SetAzureStackHCIRegistrationScript -Session $clusterNodeSession -Params $Params

                Write-VerboseLog ("Successfully performed: {0}" -f ($Params | Out-String))

            }

            catch

            {

                $errorMessage = $_.Exception.Message.ToString()

                Write-VerboseLog ($SetAzureStackHCIRegistrationErrorMessage -f $errorMessage)

                Write-ErrorLog ($SetAzureStackHCIRegistrationErrorMessage -f $errorMessage) -Category OperationStopped -Exception $_ -ErrorAction Continue

                $registrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyResult -Value [OperationStatus]::Failed

                Write-Output $registrationOutput | Format-List

                throw

            }

            $isCloudManagementFeatureEnabled = $false

            $isEitherVersionOfCloudManagementSupported = $isCloudManagementSupported -OR $isCloudManagementInfraSupported

            if ($isEitherVersionOfCloudManagementSupported -eq $true)

            {

                $cloudManagementFeatureDetectoid = { $null -ne (Get-AzureStackHCI).NextSync }

                $isCloudManagementFeatureEnabled = Invoke-Command -Session $clusterNodeSession -ScriptBlock $cloudManagementFeatureDetectoid -ErrorAction Ignore

                Write-VerboseLog ("Cloud Management supported: {0}" -f $isCloudManagementSupported)

                Write-VerboseLog ("Cloud Management Infra supported: {0}" -f $isCloudManagementInfraSupported)

                Write-VerboseLog ("Cloud Management enabled:   {0}" -f $isCloudManagementFeatureEnabled)

            }

            if ($isEitherVersionOfCloudManagementSupported -eq $true -AND $isCloudManagementFeatureEnabled -eq $true)

            {

                Write-Progress -Id $MainProgressBarId -activity $RegisterProgressActivityName -status $ConfiguringCloudManagementMessage -percentcomplete 91

                Write-Progress -Id $SecondaryProgressBarId -activity $SetupCloudManagementActivityName -status $ConfiguringCloudManagementMessage -percentcomplete 10

                Write-VerboseLog ("$ConfiguringCloudManagementMessage")

                # Decide what service to use for cloud management and turn off old service if Infra is supported

                if($isCloudManagementInfraSupported)

                {

                    $cloudManagementServiceName = $CloudManagementInfraServiceName

                }

                else

                {

                    $cloudManagementServiceName = $ClusterAgentServiceName

                }

                Write-VerboseLog ("Using Cloud Management Service Name: $($cloudManagementServiceName)")

                # Start Cluster Agent Servce as Clustered Role

                $service = Invoke-Command -Session $clusterNodeSession -ScriptBlock { Get-Service -Name $using:cloudManagementServiceName -ErrorAction Ignore }

                $serviceError = $null

                if ($null -eq $service)

                {

                    $serviceError = "{0} service doesn't exist." -f $cloudManagementServiceName

                    Write-ErrorLog -Message $serviceError -ErrorAction Continue

                    Write-NodeEventLog -Message $serviceError -EventID 9119 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName -Level Warning

                }

                else

                {

                    # Run agent service as cluster resource

                    Write-Progress -Id $SecondaryProgressBarId -activity $SetupCloudManagementActivityName -status $ConfiguringCloudManagementClusterSvc -percentcomplete 20

                    $displayName = $service.DisplayName

                    Write-VerboseLog ("Found Cloud Management Agent: $displayName")

                    $group = Invoke-Command -Session $clusterNodeSession -ScriptBlock { Get-ClusterGroup -Name $using:ClusterAgentGroupName -ErrorAction Ignore }

                    if ($null -eq $group)

                    {

                        Write-VerboseLog ("Creating Cloud Management cluster group: $ClusterAgentGroupName")

                        $group = Invoke-Command -Session $clusterNodeSession -ScriptBlock { Add-ClusterGroup -Name $using:ClusterAgentGroupName -ErrorAction Ignore }

                    }

                    if ($null -ne $group)

                    {

                        Write-Progress -Id $SecondaryProgressBarId -activity $SetupCloudManagementActivityName -status $ConfiguringCloudManagementClusterSvc -percentcomplete 40

                        Write-VerboseLog ("Cloud Management cluster group: $($group | Format-List | Out-String)")

                        $svcResourcesToRemove = Invoke-Command -Session $clusterNodeSession -ScriptBlock { Get-ClusterGroup -Name $using:ClusterAgentGroupName | Get-ClusterResource -ErrorAction Ignore | Where-Object {$_.Name -ne $using:displayName} }

                        if($null -ne $svcResourcesToRemove){

                            Write-VerboseLog ("Removing unnecessary cluster resources: $($svcResourcesToRemove | Format-List | Out-String)")

                            Invoke-Command -Session $clusterNodeSession -ScriptBlock { Remove-ClusterResource -Name $using:svcResourcesToRemove.Name -ErrorAction Ignore -Force}

                        }

                        $svcResource = Invoke-Command -Session $clusterNodeSession -ScriptBlock { Get-ClusterGroup -Name $using:ClusterAgentGroupName | Get-ClusterResource -ErrorAction Ignore | Where-Object {$_.Name -eq $using:displayName} }

                        if ($null -eq $svcResource)

                        {

                            Write-Progress -Id $SecondaryProgressBarId -activity $SetupCloudManagementActivityName -status $ConfiguringCloudManagementClusterSvc -percentcomplete 60

                            Write-VerboseLog ("Creating cluster resource for Cloud Management agent")

                            $svcResource = Invoke-Command -Session $clusterNodeSession -ScriptBlock { Add-ClusterResource -Name $using:displayName -ResourceType "Generic Service" -Group $using:ClusterAgentGroupName -ErrorAction Ignore }

                        }

                        if ($null -ne $svcResource)

                        {

                            Write-Progress -Id $SecondaryProgressBarId -activity $SetupCloudManagementActivityName -status $ConfiguringCloudManagementClusterSvc -percentcomplete 80

                            Write-VerboseLog ("Cloud Management cluster resource: $($svcResource | Format-List | Out-String)")

                            Write-VerboseLog ("Setting cluster resource parameter ServiceName = $cloudManagementServiceName")

                            Invoke-Command -Session $clusterNodeSession -ScriptBlock { Get-ClusterGroup -Name $using:ClusterAgentGroupName | Get-ClusterResource -ErrorAction Ignore | Where-Object {$_.Name -eq $using:displayName} | Set-ClusterParameter -Name ServiceName -Value $using:cloudManagementServiceName -ErrorAction Ignore}

                            $group = Invoke-Command -Session $clusterNodeSession -ScriptBlock { Get-ClusterGroup -Name $using:ClusterAgentGroupName -ErrorAction Ignore }

                        }

                        else

                        {

                            $serviceError = "Failed to create cluster resource {0} in group {1}." -f $cloudManagementServiceName, $ClusterAgentGroupName

                            Write-ErrorLog -Message $serviceError -ErrorAction Continue

                            Write-NodeEventLog -Message $serviceError -EventID 9120 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName -Level Warning

                        }

                    }

                    else

                    {

                        $serviceError = "Failed to create cluster group {0}." -f $ClusterAgentGroupName

                        Write-ErrorLog -Message $serviceError -ErrorAction Continue

                        Write-NodeEventLog -Message $serviceError -EventID 9120 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName -Level Warning

                    }

                    Write-Progress -Id $SecondaryProgressBarId -activity $SetupCloudManagementActivityName -status $StartingCloudManagementMessage -percentcomplete 90

                    if ($null -ne $group -and $group.State -ne "Online")

                    {

                        Write-VerboseLog ("Cloud Management cluster resource: $($svcResource | Format-List |Out-String)")

                        Write-VerboseLog ("Starting Cluster Group $ClusterAgentGroupName")

                        $group = Invoke-Command -Session $clusterNodeSession -ScriptBlock { Start-ClusterGroup -Name $using:ClusterAgentGroupName -Wait 120 -ErrorAction Ignore }

                        if ($group.State -ne "Online")

                        {

                            $serviceError = "Failed to start {0} clustered role." -f $ClusterAgentGroupName

                            Write-ErrorLog -Message $serviceError -ErrorAction Continue

                            Write-NodeEventLog -Message $serviceError -EventID 9121 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName -Level Warning

                        }

                    }

                }

                Write-Progress -Id $SecondaryProgressBarId -activity $SetupCloudManagementActivityName -Completed

                Write-VerboseLog ("Cloud Management group: $($group | Format-List | Out-String)")

                Write-VerboseLog ("Cloud Management resource: $($svcResource | Format-List | Out-String)")

                Write-VerboseLog ("Cloud Management agent setup complete")

                if ($null -eq $serviceError)

                {

                    $registrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyClusterAgentStatus -Value ([OperationStatus]::Success)

                    # Perform a Sync on successful agent setup.

                    Invoke-Command -Session $clusterNodeSession -ScriptBlock { Sync-AzureStackHCI -ErrorAction Ignore}

                }

                else

                {

                    $registrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyClusterAgentStatus -Value ([OperationStatus]::Failed)

                    $registrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyClusterAgentError -Value $serviceError

                }

            }

            $operationStatus = [OperationStatus]::Success

        }

        # Arc enablement starts here

        Write-Progress -Id $MainProgressBarId -activity $RegisterProgressActivityName -status $RegisterArcMessage -percentcomplete 93

        Write-VerboseLog ("$RegisterArcMessage")

        $ArcCmdletsAbsentOnNodes = [System.Collections.ArrayList]::new()

        Foreach ($clusNode in $clusterNodes)

        {

            $nodeSession = $null

            try

            {

                if($Credential -eq $Null)

                {

                    $nodeSession = New-PSSession -ComputerName ($clusNode.Name + "." + $clusterDNSSuffix)

                }

                else

                {

                    $nodeSession = New-PSSession -ComputerName ($clusNode.Name + "." + $clusterDNSSuffix) -Credential $Credential

                }

            }

            catch

            {

                Write-VerboseLog ("Exception occurred in establishing new PSSession to $($clusNode.Name). ErrorMessage : " + $_.Exception.Message)

                Write-VerboseLog ($_)

                $ArcCmdletsAbsentOnNodes.Add($clusNode.Name) | Out-Null

                continue

            }

            # Check if node has Arc registration Cmdlets

            $cmdlet = Invoke-Command -Session $nodeSession -ScriptBlock { Get-Command Get-AzureStackHCIArcIntegration -Type Cmdlet -ErrorAction Ignore }

            if($cmdlet -eq $null)

            {

                Write-VerboseLog ("Arc cmdlet not present on node : {0}" -f $clusNode.Name)

                $ArcCmdletsAbsentOnNodes.Add($clusNode.Name) | Out-Null

            }

            if($nodeSession -ne $null)

            {

                Remove-PSSession $nodeSession -ErrorAction Ignore | Out-Null

            }

        }

        if($ArcCmdletsAbsentOnNodes.Count -ge 1)

        {

            $ArcCmdletsNotAvailableErrorMsg = $ArcCmdletsNotAvailableError -f ($ArcCmdletsAbsentOnNodes -join ",")

            Write-ErrorLog -Message $ArcCmdletsNotAvailableErrorMsg -Category OperationStopped -ErrorAction Continue

            $registrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyResult -Value [OperationStatus]::Failed

            Write-Output $registrationOutput | Format-List

            Write-NodeEventLog -Message $ArcCmdletsNotAvailableErrorMsg -EventID 9112 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName -Level Warning

            throw

        }

        else

        {

            $arcResourceId = $resourceId + $HCIArcInstanceName

            Write-VerboseLog ("checking if Arc resource $arcResourceId already exists")

            if($null -eq $arcres)

            {

                Write-VerboseLog ("Arc Resource does not exist, create new resource")

                $arcInstanceResourceGroup = @{"arcInstanceResourceGroup" = $ArcServerResourceGroupName}

                $arcres = New-AzResource -ResourceId $arcResourceId -ApiVersion $HCIArcAPIVersion -PropertyObject $arcInstanceResourceGroup -Force

            }

            else

            {

                Write-VerboseLog ("Arc Resource already exists")

                if ($arcres.Properties.aggregateState -eq $ArcSettingsDisableInProgressState)

                {

                    Write-ErrorLog -Message $ArcRegistrationDisableInProgressError -Category OperationStopped -ErrorAction Continue

                    $registrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyResult -Value [OperationStatus]::Failed

                    Write-Output $registrationOutput | Format-List

                    Write-NodeEventLog -Message $ArcRegistrationDisableInProgressError  -EventID 9113 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName -Level Warning

                    throw

                }

            }

            Write-VerboseLog ("Register-AzStackHCI: Arc registration triggered. ArcResourceGroupName: $ArcServerResourceGroupName")

            if($isDefaultExtensionSupported)

            {

                Write-VerboseLog "Mandatory extensions are supported. Triggering installation for mandatory extensions."

                Execute-Without-ProgressBar -ScriptBlock { Invoke-AzResourceAction -ResourceId $arcResourceId -ApiVersion $HCIArcAPIVersion -Action consentAndInstallDefaultExtensions -Force } | Out-Null

            }

            try {

                $arcResult = Register-ArcForServers -IsManagementNode $IsManagementNode -ComputerName $ComputerName -Credential $Credential -TenantId $TenantId -SubscriptionId $SubscriptionId -ResourceGroup $ArcServerResourceGroupName -Region $Region -ArcSpnCredential $ArcSpnCredential -ClusterDNSSuffix $clusterDNSSuffix -IsWAC:$IsWAC -Environment:$EnvironmentName -ArcResource $arcres -HCIResource $resource

            }

            catch {

                $operationStatus = [OperationStatus]::ArcFailed

                $registrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyErrorDetail -Value $operationStatus

                Write-Output $registrationOutput | Format-List

                throw $_.Exception.Message

            }

            if($arcResult -ne [ErrorDetail]::Success)

            {

                $operationStatus = [OperationStatus]::RegisterSucceededButArcFailed

                $registrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyErrorDetail -Value $arcResult

            }

        }

        Write-Progress -Id $MainProgressBarId -activity $RegisterProgressActivityName -Completed

        $registrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyResult -Value $operationStatus

        $registrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyPortalResourceURL -Value $portalResourceUrl

        $registrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyResourceId -Value $resourceId

        $registrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyDetails -Value $RegistrationSuccessDetailsMessage

        Write-Output $registrationOutput | Format-List

        $RegistrationCompleteEvent = "Registration completed with status:  {0}" -f ($registrationOutput | Format-List | Out-String )

        Write-InfoLog($RegistrationCompleteEvent)

        Write-NodeEventLog -Message $RegistrationCompleteEvent -EventID 9004 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName

    }

    catch

    {

        # Get script line number, offset and Command that resulted in exception. Write-Error with the exception above does not write this info.

        $positionMessage = $_.InvocationInfo.PositionMessage

        Write-NodeEventLog -Message ("Exception occurred in Register-AzStackHCI : " + $positionMessage) -EventID 9114 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName -Level Warning

        if(-Not $Error.Contains($AlreadyLoggedFlag))

        {

            Write-ErrorLog ("Exception occurred in Register-AzStackHCI") -Exception $_ -Category OperationStopped

        }

    }

    finally

    {

        try{ Disconnect-AzAccount | Out-Null } catch{}

        if($DebugPreference -ne "SilentlyContinue")

        {

            try{ Stop-Transcript | Out-Null }catch{}

        }

    }

}

function Set-ArcRoleforRPSpn {

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

    param(

        [String] $RPObjectId,

        [String] $ArcServerResourceGroupName

    )

    $stopLoop = $false

    [int]$retryCount = "0"

    [int]$maxRetryCount = "5"

    Write-VerboseLog ("Assigning HCI RP App Arc Onboarding permissions")

    do

    {

        try 

        {

            New-AzRoleAssignment -ObjectId $RPObjectId -ResourceGroupName $ArcServerResourceGroupName -RoleDefinitionName $ArcOnboardingRole | Out-Null

            Write-VerboseLog("Sucessfully assigned ARC Roles to HCI RP service principal with Object Id $($RPObjectId)")

            $stopLoop = $true

        }

        catch 

        {

            # 'Conflict' can happen when either the RoleAssignment already exists or the limit for number of role assignments has been reached.

            if ($_.Exception.Response.StatusCode -eq 'Conflict') 

            {

                $roleAssignment  = Get-AzRoleAssignment -ObjectId $RPObjectId -ResourceGroupName $ArcServerResourceGroupName -RoleDefinitionName $ArcOnboardingRole

                if ($null -ne $roleAssignment) 

                {

                    Write-VerboseLog("Sucessfully assigned ARC Roles to HCI RP service principal with Object Id $($RPObjectId)")

                    return [ErrorDetail]::Success

                }

                Write-ErrorLog ("Failed to assign roles to service principal with object Id $($RPObjectId). ErrorMessage: " + $_.Exception.Message + " PositionalMessage: " + $_.InvocationInfo.PositionMessage)

                return [ErrorDetail]::ArcPermissionsMissing

            }

            if ($retryCount -ge $maxRetryCount) 

            {

                # Timed out.

                Write-ErrorLog ("Failed to assign roles to service principal with object Id $($RPObjectId). ErrorMessage: " + $_.Exception.Message + " PositionalMessage: " + $_.InvocationInfo.PositionMessage)

                return [ErrorDetail]::ArcPermissionsMissing

            }

            Write-VerboseLog ("Could not assign roles to service principal with Object Id $($RPObjectId). Retrying in 10 seconds...")

            Start-Sleep -Seconds 10

            $retryCount = $retryCount + 1

        }

    }

    While(-Not $stopLoop)

    return [ErrorDetail]::Success

}

function New-ClusterWithRetries {

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

    param(

        [String] $ResourceIdWithAPI, 

        [String] $Payload

    )

    $stopLoop = $false

    [int]$retryCount = "0"

    [int]$maxRetryCount = "10"

    do 

    {

        $response = Invoke-AzRestMethod -Path $ResourceIdWithAPI -Method PUT -Payload $Payload

        if (($response.StatusCode -ge 200) -and ($response.StatusCode -lt 300)) 

        {

            $stopLoop = $true

            return $true

        }

        if ($retryCount -ge $maxRetryCount) 

        {

            # Timed out.

            Write-WarnLog ("Failed to create ARM resource representing the cluster. StatusCode: {0}, ErrorCode: {1}, Details: {2}" -f $response.StatusCode, $response.ErrorCode, $response.Content)

            return $false

        }

        Write-VerboseLog ("Failed to create ARM resource representing the cluster. Retrying in 10 seconds...")

        Start-Sleep -Seconds 10

        $retryCount = $retryCount + 1

    }

    While (-Not $stopLoop)

    return $true

}

<#

    .Description

    Unregister-AzStackHCI deletes the Microsoft.AzureStackHCI cloud resource representing the on-premises cluster and unregisters the on-premises cluster with Azure.

    The registered information available on the cluster is used to unregister the cluster if no parameters are passed.

    .PARAMETER SubscriptionId

    Specifies the Azure Subscription to create the resource

    .PARAMETER Region

    Specifies the Region the resource is created in Azure.

    .PARAMETER ResourceName

    Specifies the resource name of the resource created in Azure. If not specified, on-premises cluster name is used.

    .PARAMETER TenantId

    Specifies the Azure TenantId.

    .PARAMETER ResourceGroupName

    Specifies the Azure Resource Group name. If not specified <LocalClusterName>-rg will be used as resource group name.

    .PARAMETER ArmAccessToken

    Specifies the ARM access token. Specifying this along with AccountId will avoid Azure interactive logon.

    .PARAMETER GraphAccessToken

    GraphAccessToken is deprecated.

    .PARAMETER AccountId

    Specifies the AccoundId. Specifying this along with ArmAccessToken will avoid Azure interactive logon.

    .PARAMETER EnvironmentName

    Specifies the Azure Environment. Default is AzureCloud. Valid values are AzureCloud, AzureChinaCloud, AzurePPE, AzureCanary, AzureUSGovernment

    .PARAMETER UseDeviceAuthentication

    Use device code authentication instead of an interactive browser prompt.

    .PARAMETER ComputerName

    Specifies one of the cluster node in on-premise cluster that is being registered to Azure.

    .PARAMETER DisableOnlyAzureArcServer

    Specifying this parameter to $true will only unregister the cluster nodes with Arc for servers and Azure Stack HCI registration will not be altered.

    .PARAMETER Credential

    Specifies the credential for the ComputerName. Default is the current user executing the Cmdlet.

    .PARAMETER Force

    Specifies that unregistration should continue even if we could not delete the Arc extensions on the nodes.

    .OUTPUTS

    PSCustomObject. Returns following Properties in PSCustomObject

    Result: Success or Failed or Cancelled.

    .EXAMPLE

    Invoking on one of the cluster node

    C:\PS>Unregister-AzStackHCI

    Result: Success

    .EXAMPLE

    Invoking from the management node

    C:\PS>Unregister-AzStackHCI -ComputerName ClusterNode1

    Result: Success

    .EXAMPLE

    Invoking from WAC

    C:\PS>Unregister-AzStackHCI -SubscriptionId "12a0f531-56cb-4340-9501-257726d741fd" -ArmAccessToken etyer..ere= -AccountId user1@corp1.com -ResourceName DemoHCICluster3 -ResourceGroupName DemoHCIRG -Confirm:$False

    Result: Success

    .EXAMPLE

    Invoking with all the parameters

    C:\PS>Unregister-AzStackHCI -SubscriptionId "12a0f531-56cb-4340-9501-257726d741fd" -ResourceName HciCluster1 -TenantId "c31c0dbb-ce27-4c78-ad26-a5f717c14557" -ResourceGroupName HciClusterRG -ArmAccessToken eerrer..ere= -AccountId user1@corp1.com -EnvironmentName AzureCloud -ComputerName node1hci -Credential Get-Credential

    Result: Success

#>

function Unregister-AzStackHCI{

[CmdletBinding(SupportsShouldProcess, ConfirmImpact = 'High')]

param(

    [Parameter(Mandatory = $false)]

    [string] $SubscriptionId,

    [Parameter(Mandatory = $false)]

    [string] $ResourceName,

    [Parameter(Mandatory = $false)]

    [string] $TenantId,

    [Parameter(Mandatory = $false)]

    [string] $ResourceGroupName,

    [Parameter(Mandatory = $false)]

    [string] $ArmAccessToken,

    [Parameter(Mandatory = $false)]

    [string] $AccountId,

    [Parameter(Mandatory = $false)]

    [string] $EnvironmentName = $AzureCloud,

    [Parameter(Mandatory = $false)]

    [string] $Region,

    [Parameter(Mandatory = $false)]

    [string] $ComputerName,

    [Parameter(Mandatory = $false)]

    [Switch]$UseDeviceAuthentication,

    [Parameter(Mandatory = $false)]

    [Switch]$DisableOnlyAzureArcServer = $false,

    [Parameter(Mandatory = $false)]

    [System.Management.Automation.PSCredential] $Credential,

    [Parameter(Mandatory = $false)]

    [Switch] $Force

    )

    if([string]::IsNullOrEmpty($ComputerName))

    {

        $ComputerName = [Environment]::MachineName

        $IsManagementNode = $False

    }

    else

    {

        $IsManagementNode = $True

    }

    try

    {

        Setup-Logging -LogFilePrefix "UnregisterHCI" -DebugEnabled ($DebugPreference -ne "SilentlyContinue")

        $unregistrationOutput = New-Object -TypeName PSObject

        $operationStatus = [OperationStatus]::Unused

        Write-Progress -Id $MainProgressBarId -activity $UnregisterProgressActivityName -status $CheckingDependentModules -percentcomplete 1

        Check-DependentModules

        Write-Progress -Id $MainProgressBarId -activity $UnregisterProgressActivityName -status $FetchingRegistrationState -percentcomplete 2

        Write-VerboseLog ($UnregisterProgressActivityName)

        $msg = Print-FunctionParameters -Message "Unregister-AzStackHCI" -Parameters $PSBoundParameters

        Write-NodeEventLog -Message $msg  -EventID 9009 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName

        Write-NodeEventLog -Message $UnregisterProgressActivityName -EventID 9005 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName

        if($IsManagementNode)

        {

            Write-VerboseLog ("Connecting from management node")

            if($Credential -eq $Null)

            {

                $clusterNodeSession = New-PSSession -ComputerName $ComputerName

            }

            else

            {

                $clusterNodeSession = New-PSSession -ComputerName $ComputerName -Credential $Credential

            }

            $RegContext = Invoke-Command -Session $clusterNodeSession -ScriptBlock { Get-AzureStackHCI }

        }

        else

        {

            $RegContext = Get-AzureStackHCI

            $clusterNodeSession = New-PSSession -ComputerName localhost

        }

        $clusScript = {

                $clusterPowershell = Get-WindowsFeature -Name RSAT-Clustering-PowerShell;

                if ( $clusterPowershell.Installed -eq $false)

                {

                    Install-WindowsFeature RSAT-Clustering-PowerShell | Out-Null;

                }

            }

        Invoke-Command -Session $clusterNodeSession -ScriptBlock $clusScript

        $clusterDNSSuffix = Get-ClusterDNSSuffix -Session $clusterNodeSession

        Write-VerboseLog ("Cluster DNS suffix resolves to : $clusterDNSSuffix")

        $clusterDNSName = Get-ClusterDNSName -Session $clusterNodeSession

        Write-VerboseLog ("Cluster DNS Name resolves to : $clusterDNSName")

        Write-Progress -Id $MainProgressBarId -activity $UnregisterProgressActivityName -status $ValidatingParametersRegisteredInfo -percentcomplete 5

        if([string]::IsNullOrEmpty($ResourceName) -or [string]::IsNullOrEmpty($SubscriptionId))

        {

            if($RegContext.RegistrationStatus -ne [RegistrationStatus]::Registered)

            {

                Write-ErrorLog -Message $RegistrationInfoNotFound -Category OperationStopped -ErrorAction Continue

                $unregistrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyResult -Value [OperationStatus]::Failed

                Write-Output $unregistrationOutput | Format-List

                Write-NodeEventLog -Message $RegistrationInfoNotFound -EventID 9115 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName -Level Warning

                throw

            }

        }

        if([string]::IsNullOrEmpty($SubscriptionId))

        {

            $SubscriptionId = $RegContext.AzureResourceUri.Split('/')[2]

            Write-VerboseLog ("Subscription ID resolves to: $SubscriptionId")

        }

        if([string]::IsNullOrEmpty($ResourceGroupName))

        {

            $ResourceGroupName = If ($RegContext.RegistrationStatus -ne [RegistrationStatus]::Registered) { $ResourceName + "-rg" } Else { $RegContext.AzureResourceUri.Split('/')[4] }

            Write-VerboseLog ("resource Group resolves to: $ResourceGroupName")

        }

        if([string]::IsNullOrEmpty($ResourceName))

        {

            $ResourceName = $RegContext.AzureResourceUri.Split('/')[8]

            Write-VerboseLog ("resource name resolves to: $ResourceName")

        }

        $resourceId = Get-ResourceId -ResourceName $ResourceName -SubscriptionId $SubscriptionId -ResourceGroupName $ResourceGroupName

        if ($PSCmdlet.ShouldProcess($resourceId))

        {

            Write-VerboseLog ("Unregister-AzStackHCI triggered - ResourceName: $ResourceName Region: $Region `

                   SubscriptionId: $SubscriptionId Tenant: $TenantId ResourceGroupName: $ResourceGroupName `

                   AccountId: $AccountId EnvironmentName: $EnvironmentName DisableOnlyAzureArcServer: $DisableOnlyAzureArcServer Force:$Force")

            if(-Not ([string]::IsNullOrEmpty($Region)))

            {

                $Region = Normalize-RegionName -Region $Region

            }

            $TenantId = Azure-Login -SubscriptionId $SubscriptionId -TenantId $TenantId -ArmAccessToken $ArmAccessToken -GraphAccessToken $GraphAccessToken -AccountId $AccountId -EnvironmentName $EnvironmentName -ProgressActivityName $UnregisterProgressActivityName -UseDeviceAuthentication $UseDeviceAuthentication -Region $Region

            Write-Progress -Id $MainProgressBarId -activity $UnregisterProgressActivityName -status $UnregisterArcMessage -percentcomplete 40

            $arcUnregisterRes = Unregister-ArcForServers -IsManagementNode $IsManagementNode -ComputerName $ComputerName -Credential $Credential -ResourceId $resourceId -Force:$Force -ClusterDNSSuffix $clusterDNSSuffix

            if($arcUnregisterRes -eq $false)

            {

                $unregistrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyResult -Value [OperationStatus]::Failed

                Write-Output $unregistrationOutput | Format-List

                Write-NodeEventLog -Message "ARC unregistration failed" -EventID 9117 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName -Level Warning

                return

            }

            else

            {

                if ($DisableOnlyAzureArcServer -eq $true)

                {

                    $unregistrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyResult -Value [OperationStatus]::Success

                    Write-Output $unregistrationOutput | Format-List

                    Write-NodeEventLog -Message "Disabling only ARC for Servers. UnRegistration completed successfully" -EventID 9008 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName

                    return

                }

            }

            Write-Progress -Id $MainProgressBarId -activity $UnregisterProgressActivityName -status $UnregisterHCIUsageMessage -percentcomplete 45

            # Stop cluster agent service

            Invoke-Command -Session $clusterNodeSession -ScriptBlock { Remove-ClusterGroup -Name $using:ClusterAgentGroupName -RemoveResources -ErrorAction Ignore -Force | Out-Null }

            if($RegContext.RegistrationStatus -eq [RegistrationStatus]::Registered)

            {

                Invoke-Command -Session $clusterNodeSession -ScriptBlock { Remove-AzureStackHCIRegistration }

                Write-VerboseLog ("Successfully completed Remove-AzureStackHCIRegistration on cluster")

                $clusterNodes = Invoke-Command -Session $clusterNodeSession -ScriptBlock { Get-ClusterNode }

                Foreach ($clusNode in $clusterNodes)

                {

                    $nodeSession = $null

                    Write-VerboseLog ("invoking Remove-AzureStackHCIRegistrationCertificate on {0}" -f $clusNode.Name)

                    try

                    {

                        if($Credential -eq $Null)

                        {

                            $nodeSession = New-PSSession -ComputerName ($clusNode.Name + "." + $clusterDNSSuffix)

                        }

                        else

                        {

                            $nodeSession = New-PSSession -ComputerName ($clusNode.Name + "." + $clusterDNSSuffix) -Credential $Credential

                        }

                        if([Environment]::MachineName -eq $clusNode.Name)

                        {

                            Remove-AzureStackHCIRegistrationCertificate

                        }

                        else

                        {

                            Invoke-Command -Session $nodeSession -ScriptBlock { Remove-AzureStackHCIRegistrationCertificate }

                        }

                    }

                    catch

                    {

                        Write-WarnLog ($FailedToRemoveRegistrationCertWarning -f $clusNode.Name)

                        Write-VerboseLog ("Exception occurred in clearing certificate on {0}. ErrorMessage : {1}" -f ($clusNode.Name), ($_.Exception.Message))

                        Write-VerboseLog ($_)

                        continue

                    }

                }

            }

            $resource = Get-AzResource -ResourceId $resourceId -ApiVersion $RPAPIVersion -ErrorAction Ignore

            if($resource -ne $Null)

            {

                $DeletingCloudResourceMessageProgress = $DeletingCloudResourceMessage -f $ResourceName

                Write-Progress -Id $MainProgressBarId -activity $UnregisterProgressActivityName -status $DeletingCloudResourceMessageProgress -percentcomplete 80

                Write-VerboseLog ("$DeletingCloudResourceMessageProgress")

                $remResource =  Execute-Without-ProgressBar -ScriptBlock { Remove-AzResource -ResourceId $resourceId -ApiVersion $RPAPIVersion -Force } 

                $clusterAADApplication = Get-AzADApplication -ApplicationId $resource.Properties.aadClientId -ErrorAction:SilentlyContinue

                if($clusterAADApplication -ne $Null)

                {

                    # when registration happens via older version of the registration script and unregistration happens via newever version

                    # service will  not be able to delete the app since it does not own it.

                    try

                    {

                        Write-VerboseLog ("Deleting Cluster AAD application: $($resource.Properties.aadClientId)") 

                        Remove-AzADApplication -ApplicationId  $resource.Properties.aadClientId -ErrorAction Stop | Out-Null

                    }

                    catch

                    {

                        #consume exception, this is best effort. Log warning and continue if it fails.

                        $msg = "Deleting Cluster AAD application Failed $($resource.Properties.aadClientId) . ErrorMessage : {0}. Please delete it manually." -f ($_.Exception.Message)

                        Write-NodeEventLog -Message $msg  -EventID 9010 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName

                        Write-WarnLog ($msg)

                    }

                }

            }

            Write-VerboseLog("Unregister ResourceGroupName $ResourceGroupName")

            Remove-ResourceGroup -ResourceGroupName $ResourceGroupName

            $operationStatus = [OperationStatus]::Success

        }

        else

        {

            $operationStatus = [OperationStatus]::Cancelled

        }

        Write-Progress -Id $MainProgressBarId -activity $UnregisterProgressActivityName -Completed

        $unregistrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyResult -Value $operationStatus

        if ($operationStatus -eq [OperationStatus]::Success)

        {

            $unregistrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyDetails -Value $UnregistrationSuccessDetailsMessage

            Write-NodeEventLog -Message $UnregistrationSuccessDetailsMessage -EventID 9007 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName

        }

        Write-Output $unregistrationOutput | Format-List

    }

    catch

    {

         # Get script line number, offset and Command that resulted in exception. Write-ErrorLog with the exception above does not write this info.

         $positionMessage = $_.InvocationInfo.PositionMessage

         Write-NodeEventLog -Message ("Exception occurred in Unregister-AzStackHCI : " + $positionMessage) -EventID 9118 -IsManagementNode $IsManagementNode -credentials $Credential -ComputerName $ComputerName -Level Warning

        if(-Not $Error.Contains($AlreadyLoggedFlag))

        {

            Write-ErrorLog ("Exception occurred in Unregister-AzStackHCI") -Exception $_ -Category OperationStopped -ErrorAction Continue

        }

    }

    finally

    {

        try{ Disconnect-AzAccount | Out-Null } catch{}

        if($DebugPreference -ne "SilentlyContinue")

        {

            try{ Stop-Transcript | Out-Null }catch{}

        }

    }

}

function Remove-ArcRoleAssignments {

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

    param(

        [String] $ResourceGroupName,

        [String] $ResourceId

    )

    try 

    {

        Write-VerboseLog ("Removing Arc onboarding role from HCI RP App on resource group: $ResourceGroupName.")

        $arcResourcesInArcRG = Get-AzResource -ResourceGroupName $ResourceGroupName -ResourceType $ArcMachineResourceType

        $clusterCloudResource = Get-AzResource -ResourceId $ResourceId -ApiVersion $RPAPIVersion -ErrorAction Ignore

        foreach ($arcResource in $arcResourcesInArcRG)

        {

            $arcResourceDetails = Get-AzResource -ResourceId $arcResource.ResourceId -ApiVersion $HCApiVersion

            if(-Not [string]::IsNullOrEmpty($arcResourceDetails.Properties.parentClusterResourceId))

            {

                Write-VerboseLog ("Arc for server resource with parentClusterResourceId set exists in the resource group: $ResourceGroupName. Won't remove Arc onboarding role from HCI RP App.")

                return

            }

        }

        if(($null -ne $clusterCloudResource) -and ($null -ne $clusterCloudResource.Properties.resourceProviderObjectId))

        {

            Remove-AzRoleAssignment -ObjectId $clusterCloudResource.Properties.resourceProviderObjectId -ResourceGroupName $ResourceGroupName -RoleDefinitionName $ArcOnboardingRole -ErrorAction Stop

            Write-VerboseLog ("Successfully removed role: {0} from HCI RP App on resource group: {1}" -f $ArcOnboardingRole, $ResourceGroupName)

        }

        else

        {

            if($null -eq $clusterCloudResource)

            {

                Write-VerboseLog ("Unable to remove Arc onboarding role from HCI RP App as HCI cluster cloud resource doesn't exist.")

            }

            else

            {

                Write-VerboseLog ("Unable to remove Arc onboarding role from HCI RP App as HCI cluster cloud resource doesn't contain resourceProviderObjectId.")

            }

        }        

    }

    catch 

    {

        Write-VerboseLog ("Exception occurred while removing Arc onboarding role from HCI RP App on Arc resource group: {0}" -f $_.Exception.Message)    

    }

}

function Remove-ResourceGroup {

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

    param(

        [String] $ResourceGroupName 

    )

    Write-VerboseLog ("Trying to delete resource group: $ResourceGroupName")

    $resGroup = Get-AzResourceGroup -Name $ResourceGroupName -ErrorAction Ignore

    if ($Null -eq $resGroup) 

    {

        Write-VerboseLog ("Resource Group Not Found")

        return

    }

    $resGroupTags = $resGroup.Tags

    if ($Null -eq $resGroupTags) 

    {

        Write-VerboseLog ("No tags found on the Resource Group, Not Deleting.")

        return

    }

    $resGroupTagsCreatedBy = $resGroupTags[$ResourceGroupCreatedByName]

    # If resource is created by us during registration and if there are no resources in resource group, then delete it.

    if ($resGroupTagsCreatedBy -eq $ResourceGroupCreatedByValue) 

    {

        $resourcesInRG = Get-AzResource -ResourceGroupName $ResourceGroupName

        if ($null -eq $resourcesInRG) 

        {

            # Resource group is empty

            Write-VerboseLog ("Resource group $ResourceGroupName is empty and created by Az.StackHCI. Deleting it")

            try 

            {

                Remove-AzResourceGroup -Name $ResourceGroupName -Force | Out-Null

            }

            catch 

            {

                Write-VerboseLog ("Deleting Resource Group $ResourceGroupName failed. ErrorMessage : {0}" -f ($_.Exception.Message))

            }

        }

        else 

        {

            Write-VerboseLog ("Resource group is not empty, not deleting ")

        }

    }

    else 

    {

        Write-VerboseLog ("Resource group not created by Az.StackHCI. Not deleting")

    }

}

<#

    .Description

    Set-AzStackHCI modifies resource properties of the Microsoft.AzureStackHCI cloud resource representing the on-premises cluster to enable or disable features.

    .PARAMETER ComputerName

    Specifies one of the cluster node in on-premise cluster that is registered to Azure.

    .PARAMETER Credential

    Specifies the credential for the ComputerName. Default is the current user executing the Cmdlet.

    .PARAMETER ResourceId

    Specifies the fully qualified resource ID, including the subscription, as in the following example: `/Subscriptions/`subscription ID`/providers/Microsoft.AzureStackHCI/clusters/MyCluster`

    .PARAMETER EnableWSSubscription

    Specifies if Windows Server Subscription should be enabled or disabled. Enabling this feature starts billing through your Azure subscription for Windows Server guest licenses.

    .PARAMETER DiagnosticLevel

    Specifies the diagnostic level for the cluster.

    .PARAMETER TenantId

    Specifies the Azure TenantId.

    .PARAMETER ArmAccessToken

    Specifies the ARM access token. Specifying this along with AccountId will avoid Azure interactive logon.

    .PARAMETER GraphAccessToken

    GraphAccessToken is deprecated.

    .PARAMETER AccountId

    Specifies the ARM access token. Specifying this along with ArmAccessToken will avoid Azure interactive logon.

    .PARAMETER EnvironmentName

    Specifies the Azure Environment. Default is AzureCloud. Valid values are AzureCloud, AzureChinaCloud, AzurePPE, AzureCanary, AzureUSGovernment

    .PARAMETER UseDeviceAuthentication

    Use device code authentication instead of an interactive browser prompt.

    .PARAMETER Force

    Forces the command to run without asking for user confirmation.

    .OUTPUTS

    PSCustomObject. Returns following Properties in PSCustomObject

    Result: Success or Failed or Cancelled.

    .EXAMPLE

    Invoking on one of the cluster node to enable Windows Server Subscription feature

    PS C:\> Set-AzStackHCI -EnableWSSubscription $true

    Result: Success

    .EXAMPLE

    Invoking from the management node to set the diagnostic level to Basic

    PS C:\> Set-AzStackHCI -ComputerName ClusterNode1 -DiagnosticLevel Basic

    Result: Success

#>

function Set-AzStackHCI{

[CmdletBinding(SupportsShouldProcess, ConfirmImpact = 'High')]

[OutputType([PSCustomObject])]

param(

    [Parameter(Position = 0, Mandatory = $false)]

    [string] $ComputerName,

    [Parameter(Mandatory = $false)]

    [System.Management.Automation.PSCredential] $Credential,

    [Parameter(Mandatory = $false)]

    [string] $ResourceId,

    [Parameter(Mandatory = $false)]

    [Bool] $EnableWSSubscription,

    [Parameter(Mandatory = $false)]

    [DiagnosticLevel] $DiagnosticLevel,

    [Parameter(Mandatory = $false)]

    [string] $TenantId,

    [Parameter(Mandatory = $false)]

    [string] $ArmAccessToken,

    [Parameter(Mandatory = $false)]

    [string] $AccountId,

    [Parameter(Mandatory = $false)]

    [string] $EnvironmentName = $AzureCloud,

    [Parameter(Mandatory = $false)]

    [Switch]$UseDeviceAuthentication,

    [Parameter(Mandatory = $false)]

    [Switch] $Force

    )

    $setOutput          = New-Object -TypeName PSObject

    $doSetResource      = $false

    $needShouldContinue = $false

    $doAzAuth           = $false

    $isManagementNode   = $false

    $nodeSessionParams  = @{}

    $subscriptionId     = [string]::Empty

    $armResourceId      = [string]::Empty

    $armResource        = $null

    $successMessage     = New-Object -TypeName System.Text.StringBuilder

    try

    {

        Setup-Logging -LogFilePrefix "SetAzStackHCI"  -DebugEnabled  ($DebugPreference -ne "SilentlyContinue")

        Show-LatestModuleVersion

        if([string]::IsNullOrEmpty($ComputerName))

        {

            $ComputerName = [Environment]::MachineName

            $isManagementNode = $false

        }

        else

        {

            $isManagementNode = $true

        }

        Write-Progress -Id $MainProgressBarId -Activity $SetProgressActivityName -Status $CheckingDependentModules -PercentComplete 2

        Check-DependentModules

        Write-Progress -Id $MainProgressBarId -Activity $SetProgressActivityName -Status $SetProgressStatusGathering -PercentComplete 5

        if($PSBoundParameters.ContainsKey('ResourceId') -eq $false)

        {

            $regContext = $null

            if($isManagementNode)

            {

                $nodeSessionParams.Add('ComputerName', $ComputerName)

                if($Credential -ne $null)

                {

                    $nodeSessionParams.Add('Credential', $Credential)

                }

                $regContext = Invoke-Command @nodeSessionParams -ScriptBlock { Get-AzureStackHCI }

            }

            else

            {

                $regContext = Get-AzureStackHCI

            }

            if ($regContext.RegistrationStatus -ne [RegistrationStatus]::Registered)

            {

                Write-ErrorLog -Category InvalidOperation -Message $SetAzResourceClusterNotRegistered -Category OperationStopped -ErrorAction Continue

                $setOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyResult -Value ([OperationStatus]::Failed)

                $setOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyErrorDetail -Value $SetAzResourceClusterNotRegistered

                Write-Output $setOutput | Format-List

                throw

            }

            $clusScript = {

                    $clusterPowershell = Get-WindowsFeature -Name RSAT-Clustering-PowerShell;

                    if ( $clusterPowershell.Installed -eq $false)

                    {

                        Install-WindowsFeature RSAT-Clustering-PowerShell | Out-Null;

                    }

                }

            Invoke-Command @nodeSessionParams -ScriptBlock $clusScript

            $clusterNodes = Invoke-Command @nodeSessionParams -ScriptBlock { Get-ClusterNode }

            $nodeDown = $false

            $nodeDown = ($clusterNodes | % { if ($_.State -ne 'Up') { return $true } })

            if ($nodeDown -eq $true)

            {

                Write-ErrorLog -Category ConnectionError -Message $SetAzResourceClusterNodesDown -Category OperationStopped -ErrorAction Continue

                $setOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyResult -Value ([OperationStatus]::Failed)

                $setOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyErrorDetail -Value $SetAzResourceClusterNodesDown

                Write-Output $setOutput | Format-List

                throw

            }

            $subscriptionId    = $regContext.AzureResourceUri.Split('/')[2]

            $resourceGroupName = $regContext.AzureResourceUri.Split('/')[4]

            $resourceName      = $regContext.AzureResourceUri.Split('/')[8]

            $armResourceId = Get-ResourceId -SubscriptionId $subscriptionId -ResourceGroupName $resourceGroupName -ResourceName $resourceName

        }

        else

        {

            $armResourceId  = $ResourceId

            $subscriptionId = $ResourceId.Split('/')[2]

        }

        Write-Progress -Id $MainProgressBarId -Activity $SetProgressActivityName -Status $SetProgressStatusGetAzureResource -PercentComplete 20

        if($PSBoundParameters.ContainsKey('ArmAccessToken') -eq $true)

        {

            $doAzAuth = $true

        }

        else

        {

            $azContext = Get-AzContext -ErrorAction SilentlyContinue

            if ($azContext -eq $null)

            {

                $doAzAuth = $true

            }

            else

            {

                if ($azContext.Subscription.Id -ne $subscriptionId)

                {

                    $currentOperation = ($SetProgressStatusOpSwitching -f $subscriptionId)

                    Write-Progress -Id $MainProgressBarId -Activity $SetProgressActivityName -Status $SetProgressStatusGetAzureResource -CurrentOperation $currentOperation -PercentComplete 35

                    $azContext = Set-AzContext -SubscriptionId $subscriptionId -ErrorAction Stop

                }

            }

        }

        if ($doAzAuth -eq $true)

        {

            $azureLoginParameters = @{

                                        'SubscriptionId'          = $subscriptionId;

                                        'TenantId'                = $TenantId;

                                        'ArmAccessToken'          = $ArmAccessToken;

                                        'GraphAccessToken'        = $GraphAccessToken;

                                        'AccountId'               = $AccountId;

                                        'EnvironmentName'         = $EnvironmentName;

                                        'UseDeviceAuthentication' = $UseDeviceAuthentication;

                                        'ProgressActivityName'    = $SetProgressActivityName

                                     }

            $TenantId = Azure-Login @azureLoginParameters

        }

        $armResource = Get-AzResource -ResourceId $armResourceId -ExpandProperties -ApiVersion $RPAPIVersion -ErrorAction Stop

        $properties = [PSCustomObject]@{

            desiredProperties = $armResource.Properties.desiredProperties

            aadClientId = $armResource.Properties.aadClientId

            aadTenantId = $armResource.Properties.aadTenantId

            aadServicePrincipalObjectId = $armResource.Properties.aadServicePrincipalObjectId

            aadApplicationObjectId = $armResource.Properties.aadApplicationObjectId

        }

        if ($properties.desiredProperties -eq $null)

        {

            #

            # Create desiredProperties object with default values

            #

            $desiredProperties = New-Object -TypeName PSObject

            $desiredProperties | Add-Member -MemberType NoteProperty -Name 'windowsServerSubscription' -Value 'Disabled'

            $desiredProperties | Add-Member -MemberType NoteProperty -Name 'diagnosticLevel' -Value 'Basic'

            $properties | Add-Member -MemberType NoteProperty -Name 'desiredProperties' -Value $desiredProperties

        }

        if ($PSBoundParameters.ContainsKey('EnableWSSubscription'))

        {

            if ($EnableWSSubscription -eq $true)

            {

                $properties.desiredProperties.windowsServerSubscription = 'Enabled';

                $successMessage.Append($SetAzResourceSuccessWSSE) | Out-Null;

            }

            else

            {

                $properties.desiredProperties.windowsServerSubscription = 'Disabled';

                $successMessage.Append($SetAzResourceSuccessWSSD) | Out-Null;

            }

            $doSetResource      = $true

            $needShouldContinue = $true

        }

        if ($PSBoundParameters.ContainsKey('DiagnosticLevel'))

        {

            $properties.desiredProperties.diagnosticLevel = $DiagnosticLevel.ToString()

            if ($successMessage.Length -gt 0)

            {

                $successMessage.AppendFormat(" {0}", ($SetAzResourceSuccessDiagLevel -f $DiagnosticLevel.ToString())) | Out-Null

            }

            else

            {

                $successMessage.AppendFormat("{0}", ($SetAzResourceSuccessDiagLevel -f $DiagnosticLevel.ToString())) | Out-Null

            }

            $doSetResource = $true

        }

        if ($doSetResource -eq $true)

        {

            if ($PSCmdlet.ShouldProcess($armResourceId, $SetProgressShouldProcess))

            {

                if ($needShouldContinue -eq $true)

                {

                    if (($Force -or $PSCmdlet.ShouldContinue($SetProgressShouldContinue, $SetProgressShouldContinueCaption)) -eq $false)

                    {

                        return;

                    }

                }

                Write-Progress -Id $MainProgressBarId -Activity $SetProgressActivityName -Status $SetProgressStatusUpdatingProps -PercentComplete 60

                $setAzResourceParameters = @{

                                            'ResourceId'  = $armResource.Id;

                                            'Properties'  = $properties;

                                            'ApiVersion'  = $RPAPIVersion

                                            }

                $localResult = Set-AzResource @setAzResourceParameters -Confirm:$false -Force -ErrorAction Stop

                if ($PSBoundParameters.ContainsKey('EnableWSSubscription') -and ($EnableWSSubscription -eq $false))

                {

                    Write-WarnLog ($SetProgressWarningWSSD)

                }

                if ($PSBoundParameters.ContainsKey('DiagnosticLevel') -and ($DiagnosticLevel -eq [DiagnosticLevel]::Off))

                {

                    Write-WarnLog ($SetProgressWarningDiagnosticOff)

                }

            }

            else

            {

                return;

            }

        }

        #

        # Schedule a sync on the cluster

        #

        if($PSBoundParameters.ContainsKey('ResourceId') -eq $false)

        {

            if ($doSetResource -eq $true)

            {

                Write-Progress -Id $MainProgressBarId -Activity $SetProgressActivityName -Status $SetProgressStatusSyncCluster -PercentComplete 90

                Invoke-Command @nodeSessionParams -ScriptBlock { Sync-AzureStackHCI }

            }

        }

        Write-Progress -Id $MainProgressBarId -activity $SetProgressActivityName -Completed

        $setOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyResult -Value ([OperationStatus]::Success)

        $setOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyDetails -Value ($successMessage.ToString())

        Write-Output $setOutput | Format-List

    }

    catch

    {

        if(-Not $Error.Contains($AlreadyLoggedFlag))

        {

            Write-ErrorLog ("Exception occurred in {0}" -f $PSCmdlet.MyInvocation.InvocationName) -Exception $_ -Category OperationStopped

        }

    }

    finally

    {

        if ($doAzAuth -eq $true)

        {

            try { Disconnect-AzAccount | Out-Null } catch{}

        }

        if($DebugPreference -ne "SilentlyContinue")

        {

            try{ Stop-Transcript | Out-Null }catch{}

        }

    }

}

#

# IMDS Attestation Section

#

function Add-VMDevicesForImds{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

param(

    [hashtable] $VmAdapterParams,

    [hashtable] $VmAdapterAdditionalParams,

    [hashtable] $VmAdapterVlanParams,

    [hashtable] $SessionParams

)

    $ret = @{ 

            Return    = $null

            Exception = $null

    }

    $sc = {

        param([hashtable]$VmAdapterParams, [hashtable]$VmAdapterAdditionalParams, [hashtable]$VmAdapterVlanParams)

        try

        {

            $hostVmSwitch   = $VmAdapterParams.VMSwitch

            $adapterParams  = @{

                    VM      = $VmAdapterParams.VM

                    Name    = $VmAdapterParams.Name

            }

            Write-Information ("Checking for previously configured adapter")

            $foundAdapter       = Get-VMNetworkAdapter @adapterParams -ErrorAction SilentlyContinue

            $adapterCount       = ($foundAdapter | Measure-Object).Count

            if ($adapterCount -eq 0)

            {

                Write-Information ("Creating IMDS network adapter on guest $($VM.Name)")

                $vmAdapter = Add-VMNetworkAdapter @adapterParams -Confirm: $false -Passthru

            }

            elseif ($adapterCount -eq 1)

            {

                Write-Information ("Found existing adapter on guest $($VM.Name)")

                $vmAdapter = $foundAdapter

            }

            else 

            {

                Write-Information ("Found additional IMDS configuration on guest $($VM.Name) adapter count=$($adapterCount)")

                $vmAdapter = $foundAdapter[0]    

            }

            $vmAdapter      = $vmAdapter | Set-VMNetworkAdapter @VmAdapterAdditionalParams -Confirm: $false -Passthru

            Connect-VMNetworkAdapter -VMNetworkAdapter $vmAdapter -VMSwitch $hostVmSwitch -Confirm: $false

            $vmAdapter      = Set-VMNetworkAdapterVlan -VMNetworkAdapter $vmAdapter @VmAdapterVlanParams -Confirm: $false -Passthru

            $ret.Return = $vmAdapter

            return $ret

        }

        catch

        {

            $ret.Exception = $_

            return $ret

        }

        finally

        {

            if ($ret.Exception) { try{ Remove-VMNetworkAdapter -VMNetworkAdapter $vmAdapter -Force }catch{}}

        }

    }

    $ret = Invoke-Command @SessionParams -ScriptBlock $sc -ArgumentList $VmAdapterParams,$VmAdapterAdditionalParams,$VmAdapterVlanParams -InformationVariable inf

    Write-InfoLog ($inf)

    if ($ret.Exception)

    {

        Write-ErrorLog "Unable to configure IMDS Service on VM. $($ret.Exception)" -Exception $ret.Exception -ErrorAction Continue

        throw

    }

    return $ret.Return

}

function Add-HostDevicesForImds{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

param(

    [hashtable] $VmSwitchParams,

    [hashtable] $HostAdapterVlanParams,

    [hashtable] $NetAdapterIpParams,

    [hashtable] $SessionParams

)

    $sc = {

        param([hashtable]$VmSwitchParams, [hashtable]$HostAdapterVlanParams, [hashtable]$NetAdapterIpParams)

        $ret = @{ 

            Return    = $null

            Exception = $null

        }

        try

        {

            $ignoreAdaptersParams = @{

                Path = "HKLM:\system\currentcontrolset\services\clussvc\parameters"

                Name = "ExcludeAdaptersByFriendlyName"

            }

            $propVal    = $VmSwitchParams.Name

            $propExists = Get-ItemProperty @ignoreAdaptersParams -ErrorAction SilentlyContinue

            if ($propExists)

            {

                $existingEntries = $propExists.ExcludeAdaptersByFriendlyName -Split ","

                if ($existingEntries -notcontains $propVal)

                {

                    $existingEntries += $propVal

                }

                $propVal = $existingEntries -Join ","

            }

            New-ItemProperty @ignoreAdaptersParams -Value $propVal -Force -ErrorAction SilentlyContinue | Out-Null

            Write-Information ("Searching for previous IMDS switch")

            if ($VmSwitchParams.SwitchId)

            {

                $findSwitch         = Get-VMSwitch -Id $VmSwitchParams.SwitchId -ErrorAction SilentlyContinue

            }

            $switchCount = ($findSwitch | Measure-Object).Count

            if ($switchCount -eq 0)

            {

                Write-Information ("Creating IMDS switch")

                $VmSwitchParams.Remove("SwitchId")

                $hostSwitch     = New-VMSwitch @VmSwitchParams

            }

            elseif ($switchCount -eq 1)

            {

                Write-Information ("Found existing IMDS Service Switch.")

                $hostSwitch = $findSwitch

            }

            $hostVMNetAdapter   = Get-VMNetworkAdapter -ManagementOS -SwitchName $hostSwitch.Name | Where-Object { $_.SwitchId -eq $hostSwitch.Id }

            if (!$hostVMNetAdapter)

            {

                throw("Missing host adapter.")

            }

            $hostNetAdapter     = Get-NetAdapter | Where-Object { ($_.MacAddress -replace "[^a-zA-Z0-9]","") -eq ($hostVMNetAdapter.MacAddress -replace "[^a-zA-Z0-9]","") }

            $nooutput           = $hostNetAdapter | Remove-NetIPAddress -Confirm:$false -ErrorAction SilentlyContinue

            $hostNetAdapterIP   = $hostNetAdapter | New-NetIPAddress @NetAdapterIpParams

            $hostNetAdapter     = $hostNetAdapter | Rename-NetAdapter -NewName $hostSwitch.Name -PassThru -ErrorAction SilentlyContinue

            $hostBindings       = $hostNetAdapter | Get-NetAdapterBinding | Where-Object { $_.ComponentID -ne "ms_tcpip" }

            $hostBindings | Disable-NetAdapterBinding

            $retry = 2

            while ($retry -ne 0)

            {

                $clusInterface = Get-ClusterNetworkInterface -ErrorAction SilentlyContinue | Where-Object {$_.AdapterId -eq ($hostNetAdapter.DeviceId -replace "[{}]","")}

                if (($clusInterface | Measure-Object).Count -eq 1)

                {

                    Write-Information "Found ClusterNetworkInterface for Attestation adapter $($hostNetAdapter.DeviceId)."

                    $notAttestationNet = ($clusInterface.Network | Get-ClusterNetworkInterface -ErrorAction SilentlyContinue -ErrorVariable e | Where-Object {$_.Name -notlike "*$($hostNetAdapter.Name)*"})

                    if (($notAttestationNet | Measure-Object).Count -eq 0 -and $null -eq $e)

                    {

                        Write-Information "Setting Cluster network $($clusInterface.Network.Name) Role to None."

                        ($clusInterface.Network).Role = 0

                        break

                    }

                    if ($null -ne $e)

                    {

                        Write-Information "Could not query Cluster network interface. Error=$($e | Out-String)"

                    }

                    else

                    {

                        Write-Information "Cluster network contains other network adapters. Not updating Role."

                    }

                }

                Write-Information "Retrying Attestation Cluster Network Interface check..."

                $retry--

                Start-Sleep 2

            }

            $HostAdapterVlanCommonParams = @{

                VMNetworkAdapter    = $hostVMNetAdapter

            }

            Set-VMNetworkAdapterVlan @HostAdapterVlanCommonParams @HostAdapterVlanParams -Confirm: $false| Out-Null

            $ret.Return = $hostSwitch.Id

            return $ret

        }

        catch

        {

            $ret.Exception = $_

            return $ret

        }

        finally

        {

            if ($ret.Exception) { try{ Remove-VMSwitch -VMSwitch $hostSwitch -Force }catch{}}

        }

    }

    $ret = Invoke-Command @SessionParams -ScriptBlock $sc -ArgumentList $VMSwitchParams,$HostAdapterVlanParams,$NetAdapterIpParams -InformationVariable inf

    Write-InfoLog ($inf)

    if ($ret.Exception)

    {

        Write-ErrorLog "Unable to configure IMDS Service on host. $($ret.Exception)" -Exception $ret.Exception

        throw

    }

    return $ret.Return

}

function Set-AttestationFirewallRules{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

param(

    [bool] $Enabled,

    [hashtable] $SessionParams

)

    $sc = {

        param([bool]$Enabled)

        $TemplateFirewallRuleBlockCommon = @{

            Group                = "Azure Stack HCI"

            Enabled              = "True"

            Profile              = "Any"

            Action               = "Block"

            EdgeTraversalPolicy  = "Block"

            LooseSourceMapping   = $False

            LocalOnlyMapping     = $False

            LocalAddress         = "169.254.169.253"

            RemoteAddress        = "Any"

            RemotePort           = "Any"

            IcmpType             = "Any"

            Program              = "Any"

            Service              = "Any"

            InterfaceAlias       = "Any"

            InterfaceType        = "Any"

            LocalUser            = "Any"

            RemoteUser           = "Any"

            RemoteMachine        = "Any"

            Authentication       = "NotRequired"

            Encryption           = "NotRequired"

        }

        $TemplateFirewallRuleBlockTcpOutgoing = @{

            Name                 = "AzsHci-ImdsAttestation-Block-TCP-Out"

            DisplayName          = "Azure Stack HCI IMDS Attestation (TCP-Out)"

            Description          = "Outbound rule to block all traffic for Attestation interface [TCP]"

            Direction            = "Outbound"

            Protocol             = "TCP"

            LocalPort            = "Any"

        } + $TemplateFirewallRuleBlockCommon

        $TemplateFirewallRuleBlockTcpIncoming = @{

            Name                 = "AzsHci-ImdsAttestation-Block-TCP-In"

            DisplayName          = "Azure Stack HCI IMDS Attestation (TCP-In)"

            Description          = "Inbound rule to block all traffic for Attestation interface [TCP]"

            Direction            = "Inbound"

            Protocol             = "TCP"

            LocalPort            = @("1-79","81-65535")

        } + $TemplateFirewallRuleBlockCommon

        $TemplateFirewallRuleBlockUdpOutgoing = @{

            Name                 = "AzsHci-ImdsAttestation-Block-UDP-Out"

            DisplayName          = "Azure Stack HCI IMDS Attestation (UDP-Out)"

            Description          = "Outbound rule to block all traffic for Attestation interface [UDP]"

            Direction            = "Outbound"

            Protocol             = "UDP"

            LocalPort            = "Any"

        } + $TemplateFirewallRuleBlockCommon

        $TemplateFirewallRuleBlockUdpIncoming = @{

            Name                 = "AzsHci-ImdsAttestation-Block-UDP-In"

            DisplayName          = "Azure Stack HCI IMDS Attestation (UDP-In)"

            Description          = "Inbound rule to block all traffic for Attestation interface [UDP]"

            Direction            = "Inbound"

            Protocol             = "UDP"

            LocalPort            = "Any"

        } + $TemplateFirewallRuleBlockCommon

        $DisplayGroup = "@FirewallAPI.dll,-55001"

        $firewallRules = @($TemplateFirewallRuleBlockTcpOutgoing, $TemplateFirewallRuleBlockTcpIncoming, $TemplateFirewallRuleBlockUdpOutgoing, $TemplateFirewallRuleBlockUdpIncoming)

        foreach ($rule in $firewallRules)

        {

            $foundRule = Get-NetFirewallRule -Name ($rule.Name) -ErrorAction SilentlyContinue

            if (!$foundRule)

            {

                New-NetFirewallRule @rule

                $tmpRule = Get-NetFirewallRule -Name ($rule.Name)

                $tmpRule.Group = $DisplayGroup

                $tmpRule | Set-NetFirewallRule

            }

            Set-NetFirewallRule -Name ($rule.Name) -Enabled $($Enabled.ToString())

        }

        # Also set the embedded rule with OS

        Set-NetFirewallRule -Name "AzsHci-ImdsAttestation-Allow-In" -Enabled $($Enabled.ToString())

    }

    $ret = Invoke-Command @SessionParams -ScriptBlock $sc -ArgumentList $Enabled

}

$TemplateHostImdsParams = @{

    Name                    = "AZSHCI_HOST-IMDS_DO_NOT_MODIFY"

    SwitchType              = "Internal"

    Notes                   = "Managed by Azure Stack HCI IMDS Attestation Service"

    Promiscuous             = $true

    PrimaryVlanId           = 10

    SecondaryVlanIdList     = 200

    IPAddress               = "169.254.169.253"

    PrefixLength            = 16

    NetFirewallRuleName     = "AzsHci-ImdsAttestation-Allow-In"

}

$TemplateVmImdsParams = @{

    Name                    = "AZSHCI_GUEST-IMDS_DO_NOT_MODIFY"

    MacAddressSpoofing      = "Off"

    DhcpGuard               = "On"

    RouterGuard             = "On"

    NotMonitoredInCluster   = $true

    Isolated                = $true

    PrimaryVlanId           = 10

    SecondaryVlanId         = 200

}

<#

    .Description

    Enable-AzStackHCIAttestation configures the host and enables specified guests for IMDS attestation.

    .PARAMETER ComputerName

    Specifies the AzureStack HCI host to perform the operation on. Note: this host should match the host of VMName.

    .PARAMETER Credential

    Specifies the credential for the ComputerName. Default is the current user executing the Cmdlet.

    .PARAMETER AddVM

    After enabling each cluster node for Attestation, add all guests on each node.

    .PARAMETER Force

    No confirmations.

    .OUTPUTS

    PSCustomObject. Returns following Properties in PSCustomObject

    Cluster:     Name of cluster

    Node:        Name of the host.

    Attestation: IMDS Attestation status.

    .EXAMPLE

    Invoking on one of the cluster node.

    C:\PS>Enable-AzStackHCIAttestation -AddVM

    .EXAMPLE

    Invoking from WAC/Management node and adding all existing VMs cluster-wide

    C:\PS>Enable-AzStackHCIAttestation -ComputerName "host1" -AddVM

#>

function Enable-AzStackHCIAttestation{

    [CmdletBinding(SupportsShouldProcess)]

    [OutputType([PSCustomObject])]

param(

    [Parameter(Position = 0, Mandatory = $false)]

    [string] $ComputerName,

    [Parameter(Mandatory = $false)]

    [System.Management.Automation.PSCredential] $Credential = [System.Management.Automation.PSCredential]::Empty,

    [Parameter(Mandatory = $false)]

    [switch] $AddVM,

    [Parameter(Mandatory = $false)]

    [switch] $Force

    )

    begin

    {   

        if ($Force)

        {

            $ConfirmPreference = 'None'

        }

        try

        {

            $logPath = "EnableAzureStackHCIImds"

            Setup-Logging -LogFilePrefix $logPath -DebugEnabled ($DebugPreference -ne "SilentlyContinue")

            #Show-LatestModuleVersion

            $enableImdsOutputList = [System.Collections.ArrayList]::new()

            $HyperVInstallConfirmed = $false

            if([string]::IsNullOrEmpty($ComputerName))

            {

                $ComputerName = [Environment]::MachineName

                $IsManagementNode = $False

            }

            else

            {

                $IsManagementNode = $True

            }

            $percentComplete = 1

            Write-Progress -Id $MainProgressBarId -activity $EnableAzsHciImdsActivity -status $FetchingRegistrationState -percentcomplete $percentComplete

            $SessionParams = @{

                    ErrorAction = "Stop"

            }

            if($IsManagementNode)

            {

                $SessionParams.Add("ComputerName", $ComputerName)

                if($Null -eq $Credential)

                {

                    $SessionParams.Add("Credential", $Credential)

                }

            }

            else

            {

                # An empty SessionParams will ensure commands run locally without issue

                #$SessionParams.add("ComputerName", "localhost")

            }

            # Validate cluster is registered

            $RegContext = Invoke-Command @SessionParams -ScriptBlock { Get-AzureStackHCI }

            if($RegContext.RegistrationStatus -ne [RegistrationStatus]::Registered)

            {

                throw $ImdsClusterNotRegistered

            }

            $percentComplete = 5

            Write-Progress -Id $MainProgressBarId -activity $EnableAzsHciImdsActivity -status $DiscoveringClusterNodes -percentcomplete $percentComplete

            $ClusterName, $ClusterNodes, $ClusterNodeStateUp  = Invoke-Command @SessionParams -ScriptBlock {

                $name           = (Get-Cluster).Name

                $nodes          = Get-ClusterNode

                $nodeStateUp    = [Microsoft.FailoverClusters.PowerShell.ClusterNodeState]::Up

                return $name, $nodes, $nodeStateUp

            }

            # Validate Cluster nodes are online

            if (($ClusterNodes | Where {$_.State -ne $ClusterNodeStateUp.Value} | Measure-Object).Count -ne 0)

            {

                throw $AllClusterNodesAreNotOnline

            }

            $percentComplete = 10

            Write-Progress -Id $MainProgressBarId -activity $EnableAzsHciImdsActivity -status $DiscoveringClusterNodes -percentcomplete $percentComplete

            $nodePercentChunk = (100 - ($percentComplete + 5)) / $ClusterNodes.Count / 2

        }

        catch

        {

            Write-ErrorLog -Message "Exception occurred in Enable-AzueStackHCIImdsAttestation" -Exception $_ -Category OperationStopped  -ErrorAction Continue

            throw

        }

    }

    Process

    {

        foreach ($node in $ClusterNodes)

        {

            $NodeName = $node.Name

            try 

            {

                Write-InfoLog ("Enabling IMDS Attestation on $NodeName")

                $percentComplete = $percentComplete + ($nodePercentChunk / 2)

                $ConfiguringClusterNode -f $NodeName | % { Write-Progress -Id $MainProgressBarId -activity $EnableAzsHciImdsActivity -status $_ -percentcomplete $percentComplete }

                $SessionParams["ComputerName"] = $NodeName

                if ($NodeName -ieq [Environment]::MachineName)

                {

                    $SessionParams.Remove("ComputerName")

                }

                $needHyperV = Invoke-Command @SessionParams -ScriptBlock { (Get-WindowsFeature -Name RSAT-Hyper-V-Tools).Installed -eq $false }   

                if ($needHyperV)

                {

                    if ($Force -or $HyperVInstallConfirmed -or $PSCmdlet.ShouldContinue($ShouldContinueHyperVInstall -f $NodeName, "Install Management Tools"))

                    {

                        if ($HyperVInstallConfirmed -or $PSCmdlet.ShouldProcess("Windows Feature RSAT-Hyper-V-Tools is installed on $($NodeName).", "Install RSAT-Hyper-V-Tools?", ""))

                        {

                            $HyperVInstallConfirmed = $true

                            Invoke-Command @SessionParams -ScriptBlock { Install-WindowsFeature RSAT-Hyper-V-Tools | Out-Null }

                        }

                    }

                    else

                    {

                        throw "Hyper-V RSAT tools required to continue"

                    }

                }

                $attestationSwitchId = Invoke-Command @SessionParams -ScriptBlock { (Get-AzureStackHCIAttestation).AttestationSwitchId }

                $HostVmSwitchParams = @{

                                Name                = $TemplateHostImdsParams["Name"]

                                SwitchType          = $TemplateHostImdsParams["SwitchType"]

                                Notes               = $TemplateHostImdsParams["Notes"]

                                SwitchId            = $attestationSwitchId

                }

                $HostAdapterVlanParams = @{

                                Promiscuous         = $TemplateHostImdsParams["Promiscuous"]

                                PrimaryVlanId       = $TemplateHostImdsParams["PrimaryVlanId"]

                                SecondaryVlanIdList = $TemplateHostImdsParams["SecondaryVlanIdList"]

                }

                $NetAdapterIpParams = @{

                                IPAddress           = $TemplateHostImdsParams["IPAddress"]

                                PrefixLength        = $TemplateHostImdsParams["PrefixLength"]

                }

                # Validate or Configure a new switch on host

                if($attestationSwitchId -or $Force -or $PSCmdlet.ShouldContinue($ConfirmEnableImds, "Enable Cluster $($ClusterName)?"))

                {

                    $Force = $true

                    if ($PSCmdlet.ShouldProcess("IMDS Service will be configured/validated on the host $($NodeName).", "A switch managed by the IMDS Service must be configured/validated on the host $($NodeName). Process host?", ""))

                    {

                        $percentComplete = $percentComplete + ($nodePercentChunk / 2)

                        $ConfiguringClusterNode -f $NodeName | % { Write-Progress -Id $MainProgressBarId -activity $EnableAzsHciImdsActivity -status $_ -percentcomplete $percentComplete }

                        $NotifyServiceNewSwitch = !$attestationSwitchId

                        $attestationSwitchId = Add-HostDevicesForImds -VmSwitchParams $HostVmSwitchParams -HostAdapterVlanParams $HostAdapterVlanParams -NetAdapterIpParams $NetAdapterIpParams -SessionParams $SessionParams

                        # Wait for networking stack to stabalize

                        $percentComplete = $percentComplete + ($nodePercentChunk / 2)

                        Start-Sleep 10

                        if ($NotifyServiceNewSwitch)

                        {

                            Invoke-Command @SessionParams -ScriptBlock { param($switchId); Set-AzureStackHCIAttestation -SwitchId $switchId } -ArgumentList $attestationSwitchId | Out-Null

                        }

                        Set-AttestationFirewallRules -SessionParams $SessionParams -Enabled $True

                        $nodeAttestation = (Invoke-Command @SessionParams -ScriptBlock { Get-AzureStackHCIAttestation })

                        $enableImdsOutput = New-Object -TypeName PSObject

                        $enableImdsOutput | Add-Member -MemberType NoteProperty -Name ComputerName -Value ($nodeAttestation.ComputerName)

                        $enableImdsOutput | Add-Member -MemberType NoteProperty -Name Status -Value ([ImdsAttestationNodeStatus]($nodeAttestation.Status))

                        $enableImdsOutput | Add-Member -MemberType NoteProperty -Name Expiration -Value ($nodeAttestation.Expiration)

                        $enableImdsOutputList.Add($enableImdsOutput) | Out-Null

                    }

                    elseif ($WhatIfPreference.IsPresent)

                    {

                        $attestationSwitchId = "Whatif:$(New-Guid)"

                    }

                }

                else 

                {

                    return

                }          

            }

            catch 

            {

                Write-ErrorLog ("Exception occurred in Enable-AzStackHCIAttestation") -Exception $_ -Category OperationStopped -ErrorAction Continue

                throw

            }

        }

        if ($AddVM)

        {

            foreach ($node in $ClusterNodes)

            {

                $NodeName = $node.Name

                $SessionParams["ComputerName"] = $NodeName

                if ($NodeName -ieq [Environment]::MachineName)

                {

                    $SessionParams.Remove("ComputerName")

                }

                try 

                {

                    Write-InfoLog ("Adding VMs to IMDS Attestation on $NodeName")

                    $ConfiguringClusterNode -f $NodeName | % { Write-Progress -Id $MainProgressBarId -activity $EnableAzsHciImdsActivity -status $_ -percentcomplete $percentComplete }

                    Invoke-Command @SessionParams -ScriptBlock { Add-AzStackHCIVMAttestation -AddAll } | Out-Null

                }

                catch 

                {

                    Write-ErrorLog $ErrorAddingAllVMs -Category OperationStopped 

                }

            }

        }

        Invoke-Command @SessionParams -ScriptBlock { Sync-AzureStackHCI }

        Write-Progress -Id $MainProgressBarId -activity $EnableAzsHciImdsActivity -status "Complete" -percentcomplete 100

    }

    End

    {

        $enableImdsOutputList | Write-Output

    }

}

<#

    .Description

    Disable-AzStackHCIAttestation disables IMDS Attestation on the host

    .PARAMETER RemoveVM

    Specifies the guests on each node should be removed from IMDS Attestation before disabling on cluster. Disable cannot continue before guests are removed.

    .PARAMETER ComputerName

    Specifies the AzureStack HCI host to perform the operation on.

    .PARAMETER Credential

    Specifies the credential for the ComputerName. Default is the current user executing the Cmdlet.

    .PARAMETER Force

    No confirmation.

    .OUTPUTS

    PSCustomObject. Returns following Properties in PSCustomObject

    Cluster:     Name of cluster

    Node:        Name of the host.

    Attestation: IMDS Attestation status.

    .EXAMPLE

    Remove all guests from IMDS Attestation before disabling on cluster nodes.

    C:\PS>Disable-AzStackHCIAttestation -RemoveVM

    .EXAMPLE

    Invoking from the management node/WAC

    C:\PS>Disable-AzStackHCIAttestation -ComputerName "host1"

#>

function Disable-AzStackHCIAttestation{

    [CmdletBinding(SupportsShouldProcess)]

    [OutputType([PSCustomObject])]

param(

    [Parameter(Position = 0, Mandatory = $false)]

    [string] $ComputerName,

    [Parameter(Mandatory = $false)]

    [System.Management.Automation.PSCredential] $Credential = [System.Management.Automation.PSCredential]::Empty,

    [Parameter(Mandatory = $false)]

    [switch] $RemoveVM,

    [Parameter(Mandatory = $false)]

    [switch] $Force

    )

    begin

    {   

        try

        {

            $logPath = "DisableAzureStackHCIImds"

            Setup-Logging -LogFilePrefix $logPath -DebugEnabled ($DebugPreference -ne "SilentlyContinue")

            #Show-LatestModuleVersion

            $disableImdsOutputList = [System.Collections.ArrayList]::new()

            if([string]::IsNullOrEmpty($ComputerName))

            {

                $ComputerName = [Environment]::MachineName

                $IsManagementNode = $False

            }

            else

            {

                $IsManagementNode = $True

            }

            $percentComplete = 1

            Write-Progress -Id $MainProgressBarId -activity $DisableAzsHciImdsActivity -status $FetchingRegistrationState -percentcomplete $percentComplete

            $SessionParams = @{

                    ErrorAction = "Stop"

            }

            if($IsManagementNode)

            {

                $SessionParams.Add("ComputerName", $ComputerName)

                if($Null -eq $Credential)

                {

                    $SessionParams.Add("Credential", $Credential)

                }

            }

            else

            {

                # An empty SessionParams will ensure commands run locally without issue

                #$SessionParams.add("ComputerName", "localhost")

            }

            $percentComplete = 5

            Write-Progress -Id $MainProgressBarId -activity $DisableAzsHciImdsActivity -status $DiscoveringClusterNodes -percentcomplete $percentComplete

            $ClusterName  = Invoke-Command @SessionParams -ScriptBlock { (Get-Cluster).Name }            

            $ClusterNodes = Invoke-Command @SessionParams -ScriptBlock { Get-ClusterNode }

            foreach ($node in $ClusterNodes)

            {

                $percentComplete += 1

                $CheckingClusterNode -f $node.name | % {Write-Progress -Id $MainProgressBarId -activity $DisableAzsHciImdsActivity -status $_ -percentcomplete $percentComplete}

                $NodeName = $node.Name

                $SessionParams["ComputerName"] = $NodeName

                if (!$IsManagementNode -and ($NodeName -ieq $ComputerName))

                {

                    $SessionParams.Remove("ComputerName")

                }

                if (!$RemoveVM)

                {

                    $guests = Invoke-Command @SessionParams -ScriptBlock { Get-AzStackHCIVMAttestation -Local }

                    if (($guests | Measure-Object).Count -ne 0)

                    {

                        throw ("There are still guests connected to IMDS Attestation. Use switch -RemoveVM or Remove-AzStackHCIVMAttestation cmdlet.")

                    }

                }

                else 

                {

                    $RemovingVmImdsFromNode -f $node.name | % {Write-Progress -Id $MainProgressBarId -activity $DisableAzsHciImdsActivity -status $_ -percentcomplete $percentComplete}

                    $removedGuests = Invoke-Command @SessionParams -ScriptBlock { Remove-AzStackHCIVMAttestation -RemoveAll }

                }

            }

            $percentComplete = 10

            Write-Progress -Id $MainProgressBarId -activity $DisableAzsHciImdsActivity -status $DiscoveringClusterNodes -percentcomplete $percentComplete

            $nodePercentChunk = (100 - ($percentComplete + 5)) / $ClusterNodes.Count

        }

        catch

        {

            Write-ErrorLog ("Exception occurred in Enable-AzueStackHCIImdsAttestation") -Exception $_ -Category OperationStopped -ErrorAction Continue

            throw

        }

    }

    Process

    {

        if($Force -or $PSCmdlet.ShouldContinue($ConfirmDisableImds, "Disable Cluster $($ClusterName)?"))

        {

        foreach ($node in $ClusterNodes)

        {

            $NodeName = $node.Name

            try 

            {

                Write-InfoLog ("Disabling IMDS Attestation on $NodeName")

                $percentComplete = $percentComplete + ($nodePercentChunk / 2)

                $DisablingIMDSOnNode -f $NodeName | % {Write-Progress -Id $MainProgressBarId -activity $DisableAzsHciImdsActivity -status $_ -percentcomplete $percentComplete;}

                $SessionParams["ComputerName"] = $NodeName

                if ($NodeName -ieq [Environment]::MachineName)

                {

                    $SessionParams.Remove("ComputerName")

                }

                $attestationSwitchId = Invoke-Command @SessionParams -ScriptBlock { (Get-AzureStackHCIAttestation).AttestationSwitchId }

                if ($attestationSwitchId -ne [Guid]::Empty -and $attestationSwitchId)

                {

                    Invoke-Command @SessionParams -ScriptBlock { param($switchId); Get-VMSwitch -SwitchId $switchId -ErrorAction SilentlyContinue | Remove-VMSwitch -Force -ErrorAction SilentlyContinue } -ArgumentList $attestationSwitchId

                }

                $percentComplete = $percentComplete + ($nodePercentChunk / 2)

                $DisablingIMDSOnNode -f $NodeName | % {Write-Progress -Id $MainProgressBarId -activity $DisableAzsHciImdsActivity -status $_ -percentcomplete $percentComplete; }

                Invoke-Command @SessionParams -ScriptBlock { param($switchId); Set-AzureStackHCIAttestation -SwitchId $switchId } -ArgumentList ([Guid]::Empty) | Out-Null

                Set-AttestationFirewallRules -SessionParams $SessionParams -Enabled $False

                $nodeAttestation = (Invoke-Command @SessionParams -ScriptBlock { Get-AzureStackHCIAttestation })

                $disableImdsOutput = New-Object -TypeName PSObject

                $disableImdsOutput | Add-Member -MemberType NoteProperty -Name ComputerName -Value ($nodeAttestation.ComputerName)

                $disableImdsOutput | Add-Member -MemberType NoteProperty -Name Status -Value ([ImdsAttestationNodeStatus]($nodeAttestation.Status))

                $disableImdsOutput | Add-Member -MemberType NoteProperty -Name Expiration -Value ($nodeAttestation.Expiration)

                $disableImdsOutputList.Add($disableImdsOutput) | Out-Null

            }

            catch 

            {

                Write-ErrorLog ("Exception occurred in Enable-AzueStackHCIImdsAttestation") -Exception $_ -Category OperationStopped -ErrorAction Continue

                throw

            }

        }

    }

        Invoke-Command @SessionParams -ScriptBlock { Sync-AzureStackHCI }

        Write-Progress -Id $MainProgressBarId -activity $DisableAzsHciImdsActivity -status "Complete" -percentcomplete 100

    }

    End

    {

        $disableImdsOutputList | Write-Output

    }

}

<#

    .Description

    Add-AzStackHCIVMAttestation configures guests for AzureStack HCI IMDS Attestation.

    .PARAMETER VMName

    Specifies an array of guest VMs to enable.

    .PARAMETER VM

    Specifies an array of VM objects from Get-VM.

    .PARAMETER AddAll

    Specifies a switch that will add all current guest VMs on host to IMDS Attestation on the current node.

    .Parameter Force

    No confirmations.

    .OUTPUTS

    PSCustomObject. Returns following Properties in PSCustomObject

    Name:            Name of the VM.

    AttestationHost: Host that VM is currently connected.

    Status:          Connection status.

    .EXAMPLE

    Adding all guests on current node

    C:\PS>Add-AzStackHCIVMAttestation -AddAll

    .EXAMPLE

    Invoking from the management node/WAC

    C:\PS>Invoke-Command -ScriptBlock {Add-AzStackHCIVMAttestation -VMName "guest1", "guest2"} -ComputerName "node1"

#>

function Add-AzStackHCIVMAttestation{

    [CmdletBinding(DefaultParameterSetName="VMName", SupportsShouldProcess)]

    [OutputType([PSCustomObject])]

param(

    [Parameter(Position = 0, Mandatory = $true, ValueFromPipeline = $true, ParameterSetName = "VMName")]

    [string[]] $VMName,

    [parameter(Position = 0, Mandatory = $true, ValueFromPipeline = $true, ParameterSetName = "VMObject")]

    [Object[]] $VM,

    [Parameter(Mandatory = $true, ParameterSetName = "AddAll")]

    [Switch]$AddAll,

    [Parameter(Mandatory = $false)]

    [switch] $Force

    )

    begin

    {   

        if ($Force)

        {

            $ConfirmPreference = 'None'

        }

        try

        {

            $logPath = "AddAzureStackHCIImds"

            Setup-Logging -LogFilePrefix $logPath -DebugEnabled ($DebugPreference -ne "SilentlyContinue")

            $enableImdsOutputList = [System.Collections.ArrayList]::new()

            $ComputerName = [Environment]::MachineName

            $percentcomplete = 1

            Write-Progress -Id $SecondaryProgressBarId -activity $AddAzsHciImdsActivity -status $FetchingRegistrationState -percentcomplete $percentcomplete

            $SessionParams = @{

                    ErrorAction = "Stop"

            }

            # Validate cluster is registered

            $RegContext = Invoke-Command @SessionParams -ScriptBlock { Get-AzureStackHCI }

            if($RegContext.RegistrationStatus -ne [RegistrationStatus]::Registered)

            {

                throw $ImdsClusterNotRegistered

            }

            $percentcomplete = 2

            Write-Progress -Id $SecondaryProgressBarId -activity $AddAzsHciImdsActivity -status "Verifying attestation" -percentcomplete $percentComplete

            $attestationSwitchId = Invoke-Command @SessionParams -ScriptBlock { (Get-AzureStackHCIAttestation).AttestationSwitchId }

            # Validate or Configure a new switch on host

            if(!$attestationSwitchId)

            {

                $message = $AttestationNotEnabled -f $ComputerName

                throw $message

            }          

            if ($WhatIfPreference.IsPresent)

            {

                $attestationSwitchId = "Whatif:$(New-Guid)"

            }

            if ($PSCmdlet.ShouldProcess("Will use IMDS switch $($attestationSwitchId) on $($ComputerName).", "The IMDS switch $($attestationSwitchId) was validated on $($ComputerName). Select and Continue?", ""))

            {

                $attestationSwitch = Invoke-Command @SessionParams -ScriptBlock {param($attestationSwitchId) Get-VMSwitch -Id $attestationSwitchId} -ArgumentList $attestationSwitchId

            }

            else

            {

                return

            }

            if ($PSCmdlet.ParameterSetName -eq "AddAll")

            {

                $VirtualMachines = Invoke-Command @SessionParams -ScriptBlock { Get-VM }

                Write-VerboseLog ("EnableAll specified. Found ($(($VirtualMachines | Measure-Object).Count) guests VMs.")

            }

        }

        catch

        {

            Write-ErrorLog ("Exception occurred in Add-AzStackHCIVMAttestation") -Exception $_ -Category OperationStopped -ErrorAction Continue

            throw

        }

    }

    Process

    {

        try 

        {

            if (!$attestationSwitch)

            {

                throw ("Did not validate host configuration")

            }

            Write-InfoLog ("Enabling IMDS Attestation on guest virtual machines")

            if ($VMName) 

            {

                $VirtualMachines = Invoke-Command @SessionParams -ScriptBlock {param($vms) Get-VM $vms} -ArgumentList (,$VMName)

            }

            elseif ($VM) 

            {

                $VirtualMachines = $VM

            }

            $VmNetAdapterParams = @{

                    Name                    = $TemplateVmImdsParams["Name"]

                    VmSwitch                = $attestationSwitch

            }

            $VmAdapterAdditionalParams = @{

                    MacAddressSpoofing      = $TemplateVmImdsParams["MacAddressSpoofing"]

                    DhcpGuard               = $TemplateVmImdsParams["DhcpGuard"]

                    RouterGuard             = $TemplateVmImdsParams["RouterGuard"]

                    NotMonitoredInCluster   = $TemplateVmImdsParams["NotMonitoredInCluster"]

            }

            $VmAdapterVlanParams = @{

                    Isolated                = $TemplateVmImdsParams["Isolated"]

                    PrimaryVlanId           = $TemplateVmImdsParams["PrimaryVlanId"]

                    SecondaryVlanId         = $TemplateVmImdsParams["SecondaryVlanId"]

            }

            foreach ($vm in $VirtualMachines)

            {

                if ($PSCmdlet.ShouldProcess("Added/Validated $($vm.Name) on host $($attestationSwitch.ComputerName)", "Add/Validate $($vm.Name) to IMDS Attestation on $($attestationSwitch.ComputerName)?", ""))

                {

                    $VmNetAdapterParams["VM"] = $vm

                    $vmAdapter = Add-VMDevicesForImds $VmNetAdapterParams $VmAdapterAdditionalParams $VmAdapterVlanParams $SessionParams

                    $enableImdsOutput = New-Object -TypeName PSObject

                    $enableImdsOutput | Add-Member -MemberType NoteProperty -Name Name -Value $vm.Name

                    $enableImdsOutput | Add-Member -MemberType NoteProperty -Name AttestationHost -Value $ComputerName

                    $enableImdsOutput | Add-Member -MemberType NoteProperty -Name Status -Value ([VMAttestationStatus]::Connected)

                    $enableImdsOutputList.Add($enableImdsOutput) | Out-Null

                }

            } 

        }

        catch 

        {

            Write-ErrorLog ("Exception occurred in Add-AzStackHCIVMAttestation") -Exception $_ -Category OperationStopped -ErrorAction Continue

            throw

        }

    }

    End

    {

        $enableImdsOutputList | Write-Output

    }

}

<#

    .Description

    Remove-AzStackHCIVMAttestation removes guests from AzureStack HCI IMDS Attestation.

    .PARAMETER VMName

    Specifies an array of guest VMs to enable.

    .PARAMETER VM

    Specifies an array of VM objects from Get-VM.

    .PARAMETER RemoveAll

    Specifies a switch that will remove all guest VMs from Attestation on the current node

    .PARAMETER Force

    No confirmations.

    .OUTPUTS

    PSCustomObject. Returns following Properties in PSCustomObject

    Name:            Name of the VM.

    AttestationHost: Host that VM is currently connected.

    Status:          Connection status.

    .EXAMPLE

    Removing all guests on current node

    C:\PS>Remove-AzStackHCIVMAttestation -RemoveVM

    .EXAMPLE

    Invoking from the management node/WAC

    C:\PS>Invoke-Command -ScriptBlock {Remove-AzStackHCIVMAttestation -VMName "guest1", "guest2"} -ComputerName "node1"

#>

function Remove-AzStackHCIVMAttestation{

    [CmdletBinding(DefaultParameterSetName="VMName", SupportsShouldProcess)]

    [OutputType([PSCustomObject])]

param(

    [Parameter(Position = 0, Mandatory = $true, ValueFromPipeline = $true, ParameterSetName = "VMName")]

    [string[]] $VMName,

    [parameter(Position = 0, Mandatory = $true, ValueFromPipeline = $true, ParameterSetName = "VMObject")]

    [Object[]] $VM,

    [Parameter(Mandatory = $true, ParameterSetName = "RemoveAll")]

    [Switch]$RemoveAll,

    [Parameter(Mandatory = $false)]

    [switch] $Force

    )

    begin

    {   

        if ($Force)

        {

            $ConfirmPreference = 'None'

        }

        try

        {

            $logPath = "RemoveAzureStackHCIImds"

            Setup-Logging -LogFilePrefix $logPath -DebugEnabled ($DebugPreference -ne "SilentlyContinue")

            #Show-LatestModuleVersion

            $removeImdsOutputList = [System.Collections.ArrayList]::new()

            $ComputerName = [Environment]::MachineName

            $percentcomplete = 1

            Write-Progress -Id $SecondaryProgressBarId -activity $RemoveAzsHciImdsActivity -status $FetchingRegistrationState -percentcomplete $percentcomplete

            $SessionParams = @{

                    ErrorAction = "Stop"

            }

            $percentcomplete = 2

            Write-Progress -Id $SecondaryProgressBarId -activity $RemoveAzsHciImdsActivity -status "Removing guest attestation" -percentcomplete $percentComplete

            if ($PSCmdlet.ParameterSetName -eq "RemoveAll")

            {

                $VirtualMachines = Invoke-Command @SessionParams -ScriptBlock { param($adapterName); Get-VMNetworkAdapter -All -Name $adapterName -ErrorAction SilentlyContinue | % {Get-VM $_.VMId -ErrorAction SilentlyContinue} } -ArgumentList $TemplateVmImdsParams["Name"]

                Write-VerboseLog ("RemoveAll specified. Found ($(($VirtualMachines | Measure-Object).Count) guests VMs to remove IMDS Attestation from.")

            }

        }

        catch

        {

            Write-ErrorLog ("Exception occurred in Remove-AzStackHCIVMAttestation") -Exception $_ -Category OperationStopped -ErrorAction Continue

            throw

        }

    }

    Process

    {

        try 

        {

            Write-InfoLog ("Removing IMDS Attestation on guest virtual machines")

            if ($VMName) 

            {

                $VirtualMachines = Invoke-Command @SessionParams -ScriptBlock {param($vms) Get-VM $vms} -ArgumentList (,$VMName)

            }

            elseif ($VM) 

            {

                $VirtualMachines = $VM

            }

            foreach ($vm in $VirtualMachines)

            {

                if ($PSCmdlet.ShouldProcess("Remove IMDS Attestation from $($vm.Name) on host $ComputerName", "Remove $($vm.Name) from IMDS Attestation on $ComputerName?", ""))

                {

                    Invoke-Command @SessionParams -ScriptBlock { param($adapterName); Remove-VMNetworkAdapter -VM $vm -Name $adapterName -ErrorAction Stop } -ArgumentList $TemplateVmImdsParams["Name"]

                    $removeImdsOutput = New-Object -TypeName PSObject

                    $removeImdsOutput | Add-Member -MemberType NoteProperty -Name Name -Value $vm.Name

                    $removeImdsOutput | Add-Member -MemberType NoteProperty -Name AttestationHost -Value $ComputerName

                    $removeImdsOutput | Add-Member -MemberType NoteProperty -Name Status -Value ([VMAttestationStatus]::Disconnected)

                    $removeImdsOutputList.Add($removeImdsOutput) | Out-Null

                }

            }

        }

        catch 

        {

            Write-ErrorLog ("Exception occurred in Remove-AzStackHCIVMAttestation. Check logs for details.") -Exception $_ -Category OperationStopped -ErrorAction Continue

            throw

        }

    }

    End

    {

        $removeImdsOutputList | Write-Output

    }

}

<#

    .Description

    Get-AzStackHCIVMAttestation shows a list of guests added to IMDS Attestation on a node.

    .PARAMETER Local

    Only retrieve guests with Attestation from the node executing the cmdlet.

    .OUTPUTS

    PSCustomObject. Returns following Properties in PSCustomObject.

    Name:            Name of the VM.

    AttestationHost: Host that VM is currently connected.

    Status:          Connection status.

    .EXAMPLE

    Get all guests on cluster.

    C:\PS>Get-AzStackHCIVMAttestation

    .EXAMPLE

    Get all guests on current node.

    C:\PS>Get-AzStackHCIVMAttestation -Local

#>

function Get-AzStackHCIVMAttestation {

    [CmdletBinding()]

    [OutputType([PSCustomObject])]

param(

    [Parameter(Mandatory = $false)]

    [switch] $Local

)

    begin

    {   

        try

        {

            $getImdsOutputList = [System.Collections.ArrayList]::new()

            $SessionParams = @{

                    ErrorAction = "Stop"

            }

        }

        catch

        {

            Write-ErrorLog ("Exception occurred in Get-AzStackHCIVMAttestation") -Exception $_ -Category OperationStopped

            throw

        }

    }

    Process

    {

        try 

        {   

            $nodes = [Environment]::MachineName

            if (!$Local)

            {

                $nodes = (Get-ClusterNode | Select-Object Name).Name

            }

            foreach ($node in $nodes)

            {

                $SessionParams["ComputerName"] = $node

                if ($node -ieq [Environment]::MachineName)

                {

                    $SessionParams.Remove("ComputerName")

                }

                try 

                {

                    $VirtualMachinesAdapters = $null

                    $VirtualMachinesAdapters = Invoke-Command @SessionParams -ScriptBlock {param($adapterName); Get-VMNetworkAdapter -All -Name $adapterName -ErrorAction SilentlyContinue} -ArgumentList $TemplateVmImdsParams["Name"]

                }

                catch 

                {

                    Write-ErrorLog ("Exception occurred when querying cluster node $NodeName") -Exception $_ -Category OperationStopped

                }

                foreach ($adapter in $VirtualMachinesAdapters)

                {

                    $getImdsOutput = New-Object -TypeName PSObject

                    $getImdsOutput | Add-Member -MemberType NoteProperty -Name Name -Value $adapter.VMName

                    $getImdsOutput | Add-Member -MemberType NoteProperty -Name AttestationHost -Value $node

                    $getImdsOutput | Add-Member -MemberType NoteProperty -Name Status -Value ([VMAttestationStatus]::Connected)

                    $getImdsOutputList.Add($getImdsOutput) | Out-Null

                }

            }   

        }

        catch 

        {

            Write-ErrorLog ("Exception occurred in Get-AzStackHCIVMAttestation. Check logs for details.") -Exception $_ -Category OperationStopped

            throw

        }

    }

    End

    {

        $getImdsOutputList | Write-Output

    }

}

<#

.DESCRIPTION

    New-Directory creates new directory if doesn't exist already.

.PARAMETER Path

    Mandatory. Directory path.

.EXAMPLE

    Get all guests on cluster.

    C:\PS>New-Directory -Path "C:\tool"

.NOTES

#>

function New-Directory{

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

    param(

    [Parameter(Mandatory=$true)][ValidateNotNull()][string]$Path

    )

    if (!(Test-Path -Path $Path -PathType Container))

    {

        Write-Progress("Creating directory at $Path")

        New-Item -ItemType Directory -Path $Path | Out-Null

    }

    else

    {

        Write-Progress("Directory already exists at $Path")

    }

}

<#

.SYNOPSIS

    Invokes deployment module download

.Description

    Invoke-DeploymentModuleDownload downloads Remote Support Deployment module from storage account.

.EXAMPLE

    Get all guests on cluster.

    C:\PS>Invoke-DeploymentModuleDownload

.NOTES

#>

function Invoke-DeploymentModuleDownload{

    # Remote Support

    New-Variable -Name RemoteSupportPackageUri -Value "https://remotesupportpackages.blob.core.windows.net/packages" -Option Constant -Scope Script

    $DownloadCacheDirectory = Join-Path $env:Temp "RemoteSupportPkgCache"

    $BlobLocation = "$script:RemoteSupportPackageUri/Microsoft.AzureStack.Deployment.RemoteSupport.psm1"

    $OutFile = (Join-Path $DownloadCacheDirectory "Microsoft.AzureStack.Deployment.RemoteSupport.psm1")

    New-Directory -Path $DownloadCacheDirectory

    Write-Progress("Downloading Remote Support Deployment module from the BLOB $BlobLocation")

    $retryCount = 3

    try

    {

        Setup-Logging -LogFilePrefix "AzStackHCIRemoteSupport" -DebugEnabled ($DebugPreference -ne "SilentlyContinue")

        Retry-Command -Attempts $retryCount -RetryIfNullOutput $false -ScriptBlock { Invoke-WebRequest -Uri $BlobLocation -outfile $OutFile }

    }

    finally

    {

       if($DebugPreference -ne "SilentlyContinue")

        {

            try{ Stop-Transcript | Out-Null }catch{}

        }

    }

}

<#

.SYNOPSIS

    Installs deploy module.

.DESCRIPTION 

    Install-DeployModule checks if given module is loaded and if not, it downloads, imports and installs remote support deployment module.

.EXAMPLE

    C:\PS>Install-DeployModule -ModuleName "Microsoft.AzureStack.Deployment.RemoteSupport"

.NOTES

#>

function Install-DeployModule {

    [Microsoft.Azure.PowerShell.Cmdlets.StackHCI.DoNotExportAttribute()]

    [CmdletBinding()]

    param (

        [Parameter(Mandatory=$true)]

        [string]

        $ModuleName

    )

    Setup-Logging -LogFilePrefix "AzStackHCIRemoteSupportInstallModule" -DebugEnabled ($DebugPreference -ne "SilentlyContinue")

    if(Get-Module | Where-Object { $_.Name -eq $ModuleName }){

        Write-InfoLog("$ModuleName is loaded already ...")

    }

    else{

        Write-InfoLog("$ModuleName is not loaded, downloading...")

        # Download Remote Support Deployment module from storage

        Invoke-DeploymentModuleDownload

    }

    $DownloadCacheDirectory = Join-Path $env:Temp "RemoteSupportPkgCache"

    # Import Remote Support Deployment module

    Import-Module (Join-Path $DownloadCacheDirectory "Microsoft.AzureStack.Deployment.RemoteSupport.psm1") -Force

}

<#

.SYNOPSIS

    Installs Remote Support.

.DESCRIPTION

    Install-AzStackHCIRemoteSupport installs Remote Support Deployment module.

.EXAMPLE

    C:\PS>Install-AzStackHCIRemoteSupport

.NOTES

#>

function Install-AzStackHCIRemoteSupport{

    [CmdletBinding(SupportsShouldProcess)]

    [OutputType([Boolean])]

    param()

    Setup-Logging -LogFilePrefix "AzStackHCIRemoteSupportInstall" -DebugEnabled ($DebugPreference -ne "SilentlyContinue")

    $agentInstallType = (Get-ItemProperty -Path "HKLM:\SYSTEM\Software\Microsoft\AzureStack\Observability\RemoteSupport" -ErrorAction SilentlyContinue).InstallType

    $observabilityStackPresent = Assert-IsObservabilityStackPresent

    if($observabilityStackPresent -or ($agentInstallType -eq "ArcExtension")){

        Write-InfoLog("Install-AzStackHCIRemoteSupport is not available. Observability Stack Present: <$observabilityStackPresent>. Agent install type: <$agentInstallType>")

    }

    else{

        Install-DeployModule -ModuleName "Microsoft.AzureStack.Deployment.RemoteSupport"

        Microsoft.AzureStack.Deployment.RemoteSupport\Install-RemoteSupport

    }

}

<#

.SYNOPSIS

    Removes Remote Support.

.DESCRIPTION

    Remove-AzStackHCIRemoteSupport uninstalls Remote Support Deployment module.

.EXAMPLE

    C:\PS>Remove-AzStackHCIRemoteSupport

.NOTES

#>

function Remove-AzStackHCIRemoteSupport{

    [CmdletBinding(SupportsShouldProcess)]

    [OutputType([Boolean])]

    param()

    Setup-Logging -LogFilePrefix "AzStackHCIRemoteSupportRemove" -DebugEnabled ($DebugPreference -ne "SilentlyContinue")

    $agentInstallType = (Get-ItemProperty -Path "HKLM:\SYSTEM\Software\Microsoft\AzureStack\Observability\RemoteSupport" -ErrorAction SilentlyContinue).InstallType

    $observabilityStackPresent = Assert-IsObservabilityStackPresent

    if($observabilityStackPresent -or ($agentInstallType -eq "ArcExtension")){

        Write-InfoLog("Remove-AzStackHCIRemoteSupport is not available. Observability Stack Present: <$observabilityStackPresent>. Agent install type: <$agentInstallType>")

    }

    else{

        Install-DeployModule -ModuleName "Microsoft.AzureStack.Deployment.RemoteSupport"

        Microsoft.AzureStack.Deployment.RemoteSupport\Remove-RemoteSupport

    }

}

<#

.SYNOPSIS

    Enables Remote Support.

.DESCRIPTION

    Enables Remote Support allows authorized Microsoft Support users to remotely access the device for diagnostics or repair depending on the access level granted.

.PARAMETER AccessLevel

    Controls the remote operations that can be performed. This can be either Diagnostics or DiagnosticsAndRepair.

.PARAMETER ExpireInDays

    Optional. Defaults to 8 hours.

.PARAMETER SasCredential

    Hybrid Connection SAS Credential.

.PARAMETER AgreeToRemoteSupportConsent

    Optional. If set to true then records user consent as provided and proceeds without prompt.

.EXAMPLE

    The example below enables remote support for diagnostics only for 1 day. After expiration no more remote access is allowed.

    PS C:\> Enable-AzStackHCIRemoteSupport -AccessLevel Diagnostics -ExpireInMinutes 1440 -SasCredential "Sample SAS"

.NOTES

    Requires Support VM to have stable internet connectivity.

#>

function Enable-AzStackHCIRemoteSupport{

    [CmdletBinding(SupportsShouldProcess)]

    [OutputType([Boolean])]

    param (

        [Parameter(Mandatory=$true)]

        [ValidateSet("Diagnostics","DiagnosticsRepair")]

        [string]

        $AccessLevel,

        [Parameter(Mandatory=$false)]

        [int]

        $ExpireInMinutes = 480,

        [Parameter(Mandatory=$false)]

        [string]

        $SasCredential,

        [Parameter(Mandatory=$false)]

        [switch]

        $AgreeToRemoteSupportConsent

    )

    if ($AgreeToRemoteSupportConsent -ne $true)

    {

        if($PSCmdlet.ShouldContinue("`r`nProceed with enabling remote support?", $RemoteSupportConsentText))

        {

            $AgreeToRemoteSupportConsent = $true

        }

        else

        {

            return

        }

    }

    $agentInstallType = (Get-ItemProperty -Path "HKLM:\SYSTEM\Software\Microsoft\AzureStack\Observability\RemoteSupport" -ErrorAction SilentlyContinue).InstallType

    $observabilityStackPresent = Assert-IsObservabilityStackPresent

    if($observabilityStackPresent -or ($agentInstallType -eq "ArcExtension")){

        Import-Module DiagnosticsInitializer -Force

        Enable-RemoteSupport -AccessLevel $AccessLevel -ExpireInMinutes $ExpireInMinutes -SasCredential $SasCredential -AgreeToRemoteSupportConsent:$AgreeToRemoteSupportConsent

    }

    else{

        Install-DeployModule -ModuleName "Microsoft.AzureStack.Deployment.RemoteSupport"

        Microsoft.AzureStack.Deployment.RemoteSupport\Enable-RemoteSupport -AccessLevel $AccessLevel -ExpireInMinutes $ExpireInMinutes -SasCredential $SasCredential -AgreeToRemoteSupportConsent:$AgreeToRemoteSupportConsent

    }

}

<#

.SYNOPSIS

    Disables Remote Support.

.DESCRIPTION

    Disable Remote Support revokes all access levels previously granted. Any existing support sessions will be terminated, and new sessions can no longer be established.

.EXAMPLE

    The example below disables remote support.

    PS C:\> Disable-AzStackHCIRemoteSupport

.NOTES

#>

function Disable-AzStackHCIRemoteSupport{

    [CmdletBinding(SupportsShouldProcess)]

    [OutputType([Boolean])]

    param()

    $agentInstallType = (Get-ItemProperty -Path "HKLM:\SYSTEM\Software\Microsoft\AzureStack\Observability\RemoteSupport" -ErrorAction SilentlyContinue).InstallType

    $observabilityStackPresent = Assert-IsObservabilityStackPresent

    if($observabilityStackPresent -or ($agentInstallType -eq "ArcExtension")){

        Import-Module DiagnosticsInitializer -Force

        Disable-RemoteSupport

    }

    else{

        Install-DeployModule -ModuleName "Microsoft.AzureStack.Deployment.RemoteSupport"

        Microsoft.AzureStack.Deployment.RemoteSupport\Disable-RemoteSupport

    }

}

<#

.SYNOPSIS

    Gets Remote Support Access.

.DESCRIPTION

    Gets remote support access.

.PARAMETER IncludeExpired

    Optional. Defaults to false. Indicates whether to include past expired entries.

.PARAMETER Cluster

    Optional. Defaults to false. Indicates whether to show remote support sessions across cluster.

.EXAMPLE

    The example below retrieves access level granted for remote support. The result will also include expired consents in the last 30 days.

    PS C:\> Get-AzStackHCIRemoteSupportAccess -IncludeExpired -Cluster

.NOTES

#>

function Get-AzStackHCIRemoteSupportAccess{

    [OutputType([Boolean])]

    Param(

        [Parameter(Mandatory=$false)]

        [switch]

        $Cluster,

        [Parameter(Mandatory=$false)]

        [switch]

        $IncludeExpired

    )

    $agentInstallType = (Get-ItemProperty -Path "HKLM:\SYSTEM\Software\Microsoft\AzureStack\Observability\RemoteSupport" -ErrorAction SilentlyContinue).InstallType

    $observabilityStackPresent = Assert-IsObservabilityStackPresent

    if($observabilityStackPresent -or ($agentInstallType -eq "ArcExtension")){

        Import-Module DiagnosticsInitializer -Force

        Get-RemoteSupportAccess -IncludeExpired:$IncludeExpired

    }

    else{

        Install-DeployModule -ModuleName "Microsoft.AzureStack.Deployment.RemoteSupport"

        Microsoft.AzureStack.Deployment.RemoteSupport\Get-RemoteSupportAccess -Cluster:$Cluster -IncludeExpired:$IncludeExpired

    }

}

<#

.SYNOPSIS

    Gets if Observability Remote Support Service exists. 

.DESCRIPTION

    Gets if Observability Remote Support Service exists to determine module to import.

.PARAMETER 

.EXAMPLE

    The example below returns whether environment is HCI or not.

    PS C:\> Assert-IsObservabilityStackPresent

.NOTES

#>

function Assert-IsObservabilityStackPresent{

    [OutputType([Boolean])]

    param()

    Setup-Logging -LogFilePrefix "AzStackHCIRemoteSupportObsStackPresent" -DebugEnabled ($DebugPreference -ne "SilentlyContinue")

    try{

        $obsService = Get-Service -Name "*RemoteSupportAgent*" -ErrorAction SilentlyContinue

        if($obsService){

            Write-InfoLog("RemoteSupportAgent exists, Status: $($obsService.Status).")

            return $true

        }

        else{

            Write-InfoLog("RemoteSupportAgent does not exist.")

            return $false

        }

    }

    catch{

        Write-ErrorLog "Failed while getting Observability Remote Support service." -Exception $_

        return $false

    }

}

<#

.SYNOPSIS

    Gets Remote Support Session History Details.

.DESCRIPTION

    Session history represents all remote accesses made by Microsoft Support for either Diagnostics or DiagnosticsRepair based on the Access Level granted.

.PARAMETER SessionId

    Optional. Session Id to get details for a specific session. If omitted then lists all sessions starting from date 'FromDate'.

.PARAMETER IncludeSessionTranscript

    Optional. Defaults to false. Indicates whether to include complete session transcript. Transcript provides details on all operations performed during the session.

.PARAMETER FromDate

    Optional. Defaults to last 7 days. Indicates date from where to start listing sessions from until now.

.EXAMPLE

    The example below retrieves session history with transcript details for the specified session.

    PS C:\> Get-AzStackHCIRemoteSupportSessionHistory -SessionId 467e3234-13f4-42f2-9422-81db248930fa -IncludeSessionTranscript $true

.EXAMPLE

    The example below lists session history starting from last 7 days (default) to now.

    PS C:\> Get-AzStackHCIRemoteSupportSessionHistory

.NOTES

#>

function Get-AzStackHCIRemoteSupportSessionHistory{

    [OutputType([Boolean])]

    Param(

        [Parameter(Mandatory=$false)]

        [string]

        $SessionId,

        [Parameter(Mandatory=$false)]

        [switch]

        $IncludeSessionTranscript,

        [Parameter(Mandatory=$false)]

        [DateTime]

        $FromDate = (Get-Date).AddDays(-7)

    )

    $agentInstallType = (Get-ItemProperty -Path "HKLM:\SYSTEM\Software\Microsoft\AzureStack\Observability\RemoteSupport" -ErrorAction SilentlyContinue).InstallType

    $observabilityStackPresent = Assert-IsObservabilityStackPresent

    if($observabilityStackPresent -or ($agentInstallType -eq "ArcExtension")){

        Import-Module DiagnosticsInitializer -Force

        Get-RemoteSupportSessionHistory -SessionId $SessionId -FromDate $FromDate -IncludeSessionTranscript:$IncludeSessionTranscript

    }

    else{

        Install-DeployModule -ModuleName "Microsoft.AzureStack.Deployment.RemoteSupport"

        Microsoft.AzureStack.Deployment.RemoteSupport\Get-RemoteSupportSessionHistory -SessionId $SessionId -FromDate $FromDate -IncludeSessionTranscript:$IncludeSessionTranscript

    }

}

# Export-ModuleMember -Function Register-AzStackHCI

# Export-ModuleMember -Function Unregister-AzStackHCI

# Export-ModuleMember -Function Set-AzStackHCI

# Export-ModuleMember -Function Enable-AzStackHCIAttestation

# Export-ModuleMember -Function Disable-AzStackHCIAttestation

# Export-ModuleMember -Function Add-AzStackHCIVMAttestation

# Export-ModuleMember -Function Remove-AzStackHCIVMAttestation

# Export-ModuleMember -Function Get-AzStackHCIVMAttestation

# Export-ModuleMember -Function Install-AzStackHCIRemoteSupport

# Export-ModuleMember -Function Remove-AzStackHCIRemoteSupport

# Export-ModuleMember -Function Enable-AzStackHCIRemoteSupport

# Export-ModuleMember -Function Disable-AzStackHCIRemoteSupport

# Export-ModuleMember -Function Get-AzStackHCIRemoteSupportAccess

# Export-ModuleMember -Function Get-AzStackHCIRemoteSupportSessionHistory

# SIG # Begin signature block

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