Az.StackHCI

0.8.0

Az.StackHCI.psm1

                                #

# AzureStack HCI Registration and Unregistration Powershell Cmdlets.

#

$ErrorActionPreference = 'Stop'

$GAOSBuildNumber = 17784

$GAOSUBR = 1374

#region User visible strings

$AdminConsentWarning = "You need additional Azure Active Directory permissions to register in this Azure subscription. Contact your Azure AD administrator to grant consent to AAD application identity {0} at {1}. Then, run Register-AzStackHCI again with same parameters to complete registration."

$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."

$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}.*."

$ConnectingToCloudBillingServiceFailed = "Can't reach Azure from node(s) {0}. Make sure every clustered node has network connectivity to Azure. Verify that your network firewall allows outbound HTTPS from port 443 to all the well-known Azure IP addresses and URLs required by Azure Stack HCI. Visit aka.ms/hcidocs for details."

$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."

$ArcIntegrationNotAvailableChinaCloudError = "Azure Arc integration is not available in AzureChinaCloud. Specify '-EnableAzureArcServer:`$false' in Register-AzStackHCI Cmdlet to register without Arc integration."

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

$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"

$InstallAzureADMessage = "Installing required PowerShell module: AzureAD"

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

$LoggingInToAzureMessage = "Logging in to Azure"

$ConnectingToAzureAD = "Connecting to Azure Active Directory"

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

$CreatingAADAppMessage = "Creating AAD application {0} in Azure AD directory {1}"

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

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

$GrantingAdminConsentMessage = "Trying to grant admin consent for the required permissions needed for Azure AD application identity {0}"

$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}"

$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"

$DeletingAADApplicationMessage = "Deleting Azure AD application identity {0}"

$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}"

$DeletingCertificateFromAADApp = "Deleting certificate with KeyId {0} from Azure Active Directory"

$SkippingDeleteCertificateFromAADApp = "Certificate with KeyId {0} is still being used by Azure Active Directory and won't be deleted"

$RegisterArcMessage = "Arc for servers registration triggered"

$UnregisterArcMessage = "Arc for servers unregistration triggered"

$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"

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

$CleanArcMessage = "Cleaning up Azure Arc integration"

$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."

$ArcRolesCleaningWarningMessage = "Couldn't clean up Azure AD application identity {0} used by Azure Arc integration. You can ignore this message or clean it up yourself through the Azure portal (optional)."

$RegisterArcFailedWarningMessage = "Some clustered nodes couldn't be Arc-enabled right now. This can happen if some of the nodes are down. We'll automatically try again in an hour. In the meantime, you can use Get-AzureStackHCIArcIntegration to check status on each node."

$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."

#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}'

$PortalAADAppPermissionUrl = '#blade/Microsoft_AAD_RegisteredApps/ApplicationMenuBlade/CallAnAPI/appId/{0}/isMSAApp/'

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

# GUID's of the scopes generated in first party portal

$ClusterReadPermission = "2344a320-6a09-4530-bed7-c90485b5e5e2"

$ClusterReadWritePermission = "493bd689-9082-40db-a506-11f40b68128f"

$ClusterNodeReadPermission = "8fa5445e-80fb-4c71-a3b1-9a16a81a1966"

$ClusterNodeReadWritePermission = "bbe8afc9-f3ba-4955-bb5f-1cfb6960b242"

# Deprecated scopes. Will be deleted during RepairRegistration

$BillingSyncPermission = "e4359fc6-82ee-4411-9a4d-edfc7812cf24"

$CensusSyncPermission = "8c83ab0a-0f96-40e9-940b-20cc5c5ecca9"

$PermissionIds = New-Object System.Collections.Generic.List[string]

$PermissionIds.Add($ClusterReadPermission)

$PermissionIds.Add($ClusterReadWritePermission)

$PermissionIds.Add($ClusterNodeReadPermission)

$PermissionIds.Add($ClusterNodeReadWritePermission)

$Region_EASTUSEUAP = 'eastus2euap'

[hashtable] $ServiceEndpointsAzureCloud = @{

        $Region_EASTUSEUAP = 'https://eus2euap-azurestackhci-usage.azurewebsites.net';

        }

$ServiceEndpointAzureCloudFrontDoor = "https://azurestackhci.azurefd.net"

$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://azurestackhci-usage.trafficmanager.us"

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

$BillingServiceApiScopeAzureUSGovernment = "https://azurestackhci-usage.azurewebsites.us/.default"

$GraphServiceApiScopeAzureUSGovernment = "https://graph.windows.net/.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 = "2020-10-01"

$HCIArcAPIVersion = "2021-01-01-preview"

$HCIArcInstanceName = "/arcSettings/default"

$HCIArcExtensions = "/Extensions"

$OutputPropertyResult = "Result"

$OutputPropertyResourceId = "AzureResourceId"

$OutputPropertyPortalResourceURL = "AzurePortalResourceURL"

$OutputPropertyPortalAADAppPermissionsURL = "AzurePortalAADAppPermissionsURL"

$OutputPropertyDetails = "Details"

$OutputPropertyTest = "Test"

$OutputPropertyEndpointTested = "EndpointTested"

$OutputPropertyIsRequired = "IsRequired"

$OutputPropertyFailedNodes = "FailedNodes"

$OutputPropertyErrorDetail = "ErrorDetail"

$ConnectionTestToAzureHCIServiceName = "Connect to Azure Stack HCI Service"

$ResourceGroupCreatedByName = "CreatedBy"

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

$HealthEndpointPath = "/health"

$MainProgressBarId = 1

$ArcProgressBarId = 2

$IndefinitelyYears = 300

$AzureConnectedMachineOnboardingRole = "Azure Connected Machine Onboarding"

$AzureConnectedMachineResourceAdministratorRole = "Azure Connected Machine Resource Administrator"

$ArcRegistrationTaskName = "ArcRegistrationTask"

$LogFileDir = '\Tasks\ArcForServers'

$ClusterScheduledTaskWaitTimeMinutes = 15

$ClusterScheduledTaskSleepTimeSeconds = 3

$ClusterScheduledTaskRunningState = "Running"

$ClusterScheduledTaskReadyState = "Ready"

$ArcSettingsDisableInProgressState = "DisableInProgress"

enum ArcStatus

{

    Unknown;

    Enabled;

    Disabled;

    DisableInProgress;

}

enum RegistrationStatus

{

    Registered;

    NotYet;

    OutOfPolicy;

}

enum CertificateManagedBy

{

    Invalid;

    User;

    Cluster;

}

$registerArcScript = {

    try

    {

        # Params for Enable-AzureStackHCIArcIntegration 

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

        $AgentInstaller_Name                     = 'AzureConnectedMachineAgent.msi'

        $AgentInstaller_LogFile                  = '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

        Write-Information 'Triggering Arc For Servers registration cmdlet'

        $arcStatus = Get-AzureStackHCIArcIntegration

        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.'

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

                    Sync-AzureStackHCI

                }

                else

                {

                    Write-Information 'Node is already registered.'

                }

            }

            else

            {

                # New node added case.

                Write-Information 'Registering Arc for servers.'

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

                Sync-AzureStackHCI

            }

        }

        else

        {

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

        }

    }

    catch

    {

        Write-Error -Exception $_.Exception -Category OperationStopped

        # 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-Error ('Exception occured in RegisterArcScript : ' + $positionMessage) -Category OperationStopped

    }

    finally

    {

        try{ Stop-Transcript } catch {}

    }

}

#endregion

function Setup-Logging{

param(

    [string] $LogFilePrefix

    )

    $date = Get-Date

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

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

    Start-Transcript -LiteralPath $LogFileName -Append | out-null

}

function Show-LatestModuleVersion{

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

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

    if($Null -eq $latestModule)

    {

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

        Write-Warning $CouldNotGetLatestModuleInformationWarningMsg

    }

    else

    {

        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-Warning $InstallLatestVersionWarningMsg

        }

    }

}

function Retry-Command {

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

                    $completed = $true

                }

                else

                {

                    throw "Null result received."

                }

            }

            else

            {

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

                $completed = $true

            }

        }

        catch

        {

            $exception = $_.Exception

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

            {

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

                throw

            }

            else

            {

                if ($attempt -ge $Attempts)

                {

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

                    Start-Sleep $secondsDelay

                }

            }

        }

    }

    return $result

}

function Get-PortalDomain{

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{

param(

    [string] $EnvironmentName

    )

    $defaultRegion = "eastus";

    if($EnvironmentName -eq $AzureCloud)

    {

        $defaultRegion = "eastus"

    }

    elseif($EnvironmentName -eq $AzureChinaCloud)

    {

        $defaultRegion = "chinaeast2"

    }

    elseif($EnvironmentName -eq $AzureUSGovernment)

    {

        $defaultRegion = "usgoviowa"

    }

    elseif($EnvironmentName -eq $AzureGermanCloud)

    {

        $defaultRegion = "germanynortheast"

    }

    elseif($EnvironmentName -eq $AzurePPE)

    {

        $defaultRegion = "westus"

    }

    elseif($EnvironmentName -eq $AzureCanary)

    {

        $defaultRegion = "eastus2euap"

    }

    return $defaultRegion

}

function Get-GraphAccessToken{

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{

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-PortalAppPermissionsPageUrl{

param(

    [string] $AppId,

    [string] $TenantId,

    [string] $EnvironmentName,

    [string] $Region

    )

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

    $portalAADAppRelativeUrl = $PortalAADAppPermissionUrl -f $AppId

    return $portalBaseUrl + $portalAADAppRelativeUrl

}

function Get-PortalHCIResourcePageUrl{

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{

param(

    [string] $ResourceName,

    [string] $SubscriptionId,

    [string] $ResourceGroupName

    )

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

}

function Get-RequiredResourceAccess{

    $requiredResourcesAccess = New-Object System.Collections.Generic.List[Microsoft.Open.AzureAD.Model.RequiredResourceAccess] 

    $requiredAccess = New-Object Microsoft.Open.AzureAD.Model.RequiredResourceAccess

    $requiredAccess.ResourceAppId = $UsageServiceFirstPartyAppId

    $requiredAccess.ResourceAccess = New-Object System.Collections.Generic.List[Microsoft.Open.AzureAD.Model.ResourceAccess]

    Foreach ($permId in $PermissionIds)

    {

        $permAccess = New-Object Microsoft.Open.AzureAD.Model.ResourceAccess

        $permAccess.Type = "Role"

        $permAccess.Id = $permId 

        $requiredAccess.ResourceAccess.Add($permAccess)

    }

    $requiredResourcesAccess.Add($requiredAccess)

    return $requiredResourcesAccess

}

# Called during repair registration.

function AddRequiredPermissionsIfNotPresent{

param(

    [string] $AppId

    )

    Write-Verbose "Adding the required permissions to AAD Application $AppId if not already added"

    $app = Retry-Command -ScriptBlock { Get-AzureADApplication -Filter "AppId eq '$AppId'"}

    $shouldAddRequiredPerms = $false

    if($app.RequiredResourceAccess -eq $Null)

    {

        $shouldAddRequiredPerms = $true

    }

    else

    {

        $reqResourceAccess = $app.RequiredResourceAccess | Where-Object {$_.ResourceAppId -eq $UsageServiceFirstPartyAppId}

        if($reqResourceAccess -eq $Null)

        {

            $shouldAddRequiredPerms = $true

        }

        else

        {

            if ($reqResourceAccess.ResourceAccess -eq $Null)

            {

                $shouldAddRequiredPerms = $true

            }

            else

            {

                $spReqPermClusRW = $reqResourceAccess.ResourceAccess | Where-Object {$_.Id -eq $ClusterReadWritePermission}

                $spReqPermClusR = $reqResourceAccess.ResourceAccess | Where-Object {$_.Id -eq $ClusterReadPermission}

                $spReqPermClusNodeRW = $reqResourceAccess.ResourceAccess | Where-Object {$_.Id -eq $ClusterNodeReadWritePermission}

                $spReqPermClusNodeR = $reqResourceAccess.ResourceAccess | Where-Object {$_.Id -eq $ClusterNodeReadPermission}

                # If App has these permissions, we have already added the required permissions earlier. Not need to add again.

                if(($spReqPermClusRW -ne $Null) -and ($spReqPermClusR -ne $Null) -and ($spReqPermClusNodeRW -ne $Null) -and ($spReqPermClusNodeR -ne $Null))

                {

                    $shouldAddRequiredPerms = $false

                }

                else

                {

                    $shouldAddRequiredPerms = $true

                }

            }

        }

    }

    # Add the required permissions

    if($shouldAddRequiredPerms -eq $true)

    {

        $requiredResourcesAccess = Get-RequiredResourceAccess

        Retry-Command -ScriptBlock { Set-AzureADApplication -ObjectId $app.ObjectId -RequiredResourceAccess $requiredResourcesAccess | Out-Null} -RetryIfNullOutput $false

    }

}

function Check-UsageAppRoles{

param(

    [string] $AppId

    )

    Write-Verbose "Checking admin consent status for AAD Application $AppId"

    $appSP = Retry-Command -ScriptBlock { Get-AzureADServicePrincipal -Filter "AppId eq '$AppId'"}

    # Try Get-AzureADServiceAppRoleAssignment as well to get app role assignments. WAC token falls under this case.

    $assignedPerms = Retry-Command -ScriptBlock { @(Get-AzureADServiceAppRoleAssignedTo -ObjectId $appSP.ObjectId) + @(Get-AzureADServiceAppRoleAssignment -ObjectId $appSP.ObjectId)} -RetryIfNullOutput $false

    $clusterRead = $assignedPerms | where { ($_.Id -eq $ClusterReadPermission) }

    $clusterReadWrite = $assignedPerms | where { ($_.Id -eq $ClusterReadWritePermission) }

    $clusterNodeRead = $assignedPerms | where { ($_.Id -eq $ClusterNodeReadPermission) }

    $clusterNodeReadWrite = $assignedPerms | where { ($_.Id -eq $ClusterNodeReadWritePermission) }

    $assignedPermsList = New-Object System.Collections.Generic.List[Microsoft.Open.AzureAD.Model.DirectoryObject]

    $assignedPermsList.Add($clusterRead)

    $assignedPermsList.Add($clusterReadWrite)

    $assignedPermsList.Add($clusterNodeRead)

    $assignedPermsList.Add($clusterNodeReadWrite)

    Foreach ($perm in $assignedPermsList)

    {

        if($perm -eq $null)

        {

            return $false

        }

        if($perm.DeletionTimestamp -ne $Null -and ($perm.DeletionTimestamp -gt $perm.CreationTimestamp))

        {

            return $false

        }

    }

    return $true

}

function Create-Application{

param(

    [string] $AppName

    )

    Write-Verbose "Creating AAD Application $AppName"

    # If the subscription is just registered to have HCI resources, sometimes it may take a while for the billing service principal to propogate

    $usagesp = Retry-Command -ScriptBlock { Get-AzureADServicePrincipal -Filter "AppId eq '$UsageServiceFirstPartyAppId'"}

    $requiredResourcesAccess = Get-RequiredResourceAccess

    # Create application

    $app = Retry-Command -ScriptBlock { New-AzureADApplication -DisplayName $AppName -RequiredResourceAccess $requiredResourcesAccess }

    $sp = Retry-Command -ScriptBlock { New-AzureADServicePrincipal -AppId $app.AppId }

    Write-Verbose "Created new AAD Application $app.AppId"

    return $app.AppId

}

function Grant-AdminConsent{

param(

    [string] $AppId

    )

    Write-Verbose "Granting admin consent for AAD Application Id $AppId"

    $usagesp = Retry-Command -ScriptBlock { Get-AzureADServicePrincipal -Filter "AppId eq '$UsageServiceFirstPartyAppId'"}

    $appSP = Retry-Command -ScriptBlock { Get-AzureADServicePrincipal -Filter "AppId eq '$AppId'"}

    try 

    {

        Retry-Command -ScriptBlock { New-AzureADServiceAppRoleAssignment -ObjectId $appSP.ObjectId -PrincipalId $appSP.ObjectId -ResourceId $usagesp.ObjectId -Id $ClusterReadPermission} -RetryIfNullOutput $false

        Retry-Command -ScriptBlock { New-AzureADServiceAppRoleAssignment -ObjectId $appSP.ObjectId -PrincipalId $appSP.ObjectId -ResourceId $usagesp.ObjectId -Id $ClusterReadWritePermission} -RetryIfNullOutput $false

        Retry-Command -ScriptBlock { New-AzureADServiceAppRoleAssignment -ObjectId $appSP.ObjectId -PrincipalId $appSP.ObjectId -ResourceId $usagesp.ObjectId -Id $ClusterNodeReadPermission} -RetryIfNullOutput $false

        Retry-Command -ScriptBlock { New-AzureADServiceAppRoleAssignment -ObjectId $appSP.ObjectId -PrincipalId $appSP.ObjectId -ResourceId $usagesp.ObjectId -Id $ClusterNodeReadWritePermission} -RetryIfNullOutput $false

    }

    catch 

    {

        Write-Debug "Exception occured when granting admin consent"

        $ErrorMessage = $_.Exception.Message

        Write-Debug $ErrorMessage

        return $False

    }

    return $True

}

function Remove-OldScopes{

param(

    [string] $AppId

    )

    Write-Verbose "Removing old scopes on AAD Application with Id $AppId"

    $appSP = Retry-Command -ScriptBlock { Get-AzureADServicePrincipal -Filter "AppId eq '$AppId'"}

    # Remove AzureStackHCI.Billing.Sync and AzureStackHCI.Census.Sync permissions if present as we dont need them

    $assignedPerms = Retry-Command -ScriptBlock { Get-AzureADServiceAppRoleAssignedTo -ObjectId $appSP.ObjectId} -RetryIfNullOutput $false

    $billingSync = $assignedPerms | where { ($_.Id -eq $BillingSyncPermission) }

    $censusSync = $assignedPerms | where { ($_.Id -eq $CensusSyncPermission) }

    if($billingSync -eq $Null -or $censusSync -eq $Null)

    {

        # Try Get-AzureADServiceAppRoleAssignment as well to get app role assignments. WAC token falls under this case.

        $assignedPerms = Retry-Command -ScriptBlock { Get-AzureADServiceAppRoleAssignment -ObjectId $appSP.ObjectId} -RetryIfNullOutput $false

    }

    if($billingSync -eq $Null)

    {

        $billingSync = $assignedPerms | where { ($_.Id -eq $BillingSyncPermission) }

    }

    if($censusSync -eq $Null)

    {

        $censusSync = $assignedPerms | where { ($_.Id -eq $CensusSyncPermission) }

    }

    if($billingSync -ne $Null)

    {

        Retry-Command -ScriptBlock { Remove-AzureADServiceAppRoleAssignment -ObjectId $appSP.ObjectId -AppRoleAssignmentId $billingSync.ObjectId | Out-Null} -RetryIfNullOutput $false

    }

    if($censusSync -ne $Null)

    {

        Retry-Command -ScriptBlock { Remove-AzureADServiceAppRoleAssignment -ObjectId $appSP.ObjectId -AppRoleAssignmentId $censusSync.ObjectId | Out-Null} -RetryIfNullOutput $false

    }

}

function Azure-Login{

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

    try

    {

        Import-Module -Name Az.Resources -ErrorAction Stop

    }

    catch

    {

        try

        {

            Import-PackageProvider -Name Nuget -MinimumVersion "2.8.5.201" -ErrorAction Stop

        }

        catch

        {

            Install-PackageProvider NuGet -Force | Out-Null

        }

        Install-Module -Name Az.Resources -Force -AllowClobber

        Import-Module -Name Az.Resources

    }

    Write-Progress -Id $MainProgressBarId -activity $ProgressActivityName -status $InstallAzureADMessage -percentcomplete 20

    try

    {

        Import-Module -Name AzureAD -ErrorAction Stop

    }

    catch

    {

        Install-Module -Name AzureAD -Force -AllowClobber

        Import-Module -Name AzureAD

    }

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

    if($EnvironmentName -eq $AzurePPE)

    {

        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)

    {

        $ConnectAzureADEnvironmentName = $AzureCloud

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

        {

            $Region = Get-DefaultRegion -EnvironmentName $EnvironmentName

        }

        # 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 | Out-Null

    }

    Disconnect-AzAccount -ErrorAction Ignore | Out-Null

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

    {

        # Interactive login

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

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

        {

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

            {

                Connect-AzAccount -Environment $ConnectAzAccountEnvironmentName -SubscriptionId $SubscriptionId -Scope Process | Out-Null

            }

            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

                Connect-AzAccount -Environment $ConnectAzAccountEnvironmentName -SubscriptionId $SubscriptionId -UseDeviceAuthentication -Scope Process | Out-Null

            }

        }

        else

        {

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

            {

                Connect-AzAccount -Environment $ConnectAzAccountEnvironmentName -TenantId $TenantId -SubscriptionId $SubscriptionId -Scope Process | Out-Null

            }

            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

                Connect-AzAccount -Environment $ConnectAzAccountEnvironmentName -TenantId $TenantId -SubscriptionId $SubscriptionId -UseDeviceAuthentication -Scope Process | Out-Null

            }

        }

        Write-Progress -Id $MainProgressBarId -activity $ProgressActivityName -status $ConnectingToAzureAD -percentcomplete 35

        $azContext = Get-AzContext

        $TenantId = $azContext.Tenant.Id

        $AccountId = $azContext.Account.Id

        $GraphAccessToken = Get-GraphAccessToken -TenantId $TenantId -EnvironmentName $EnvironmentName

        Connect-AzureAD -AzureEnvironmentName $ConnectAzureADEnvironmentName -TenantId $TenantId -AadAccessToken $GraphAccessToken -AccountId $AccountId | Out-Null

    }

    else

    {

        # Not an interactive login

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

        {

            Connect-AzAccount -Environment $ConnectAzAccountEnvironmentName -SubscriptionId $SubscriptionId -AccessToken $ArmAccessToken -AccountId $AccountId -GraphAccessToken $GraphAccessToken -Scope Process | Out-Null

        }

        else

        {

            Connect-AzAccount -Environment $ConnectAzAccountEnvironmentName -TenantId $TenantId -SubscriptionId $SubscriptionId -AccessToken $ArmAccessToken -AccountId $AccountId -GraphAccessToken $GraphAccessToken -Scope Process | Out-Null

        }

        Write-Progress -Id $MainProgressBarId -activity $ProgressActivityName -status $ConnectingToAzureAD -percentcomplete 35

        $azContext = Get-AzContext

        $TenantId = $azContext.Tenant.Id

        Connect-AzureAD -AzureEnvironmentName $ConnectAzureADEnvironmentName -TenantId $TenantId -AadAccessToken $GraphAccessToken -AccountId $AccountId | Out-Null

    }

    return $TenantId

}

function Normalize-RegionName{

param(

    [string] $Region

    )

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

    $regionName = $regionName.ToLower()

    return $regionName

}

function Validate-RegionName{

param(

    [string] $Region,

    [ref] $SupportedRegions

    )

    $resources = Get-AzResourceProvider -ProviderNamespace Microsoft.AzureStackHCI

    $locations = $resources.Where{($_.ResourceTypes.ResourceTypeName -eq 'clusters' -and $_.RegistrationState -eq 'Registered')}.Locations

    $locations | foreach {

        $regionName = Normalize-RegionName -Region $_

        if ($regionName -eq $Region)

        {

            # Supported region

            return $True

        }

    }

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

    return $False

}

function Get-ClusterDNSSuffix{

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 Get-ClusterDNSName{

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{

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

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

                continue

            }

        }

        catch

        {

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

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

            continue

        }

    }

}

function Setup-Certificates{

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

    )

    $userProvidedCertAddedToAAD = $false

    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-Debug ("Exception occured in establishing new PSSession. ErrorMessage : " + $_.Exception.Message)

            Write-Debug $_

            $NewCertificateFailedNodes.Add($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)))

        {

            $OSNotLatestOnNodes.Add($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 }

            }

            catch

            {

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

                Write-Debug $_

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

                continue

            }

        }

        else

        {

            # 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

                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)

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

        {

            $AddAppCredentialMessageProgress = $AddAppCredentialMessage -f $ResourceName

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

            $now = [System.DateTime]::UtcNow

            $appCredential = Retry-Command -ScriptBlock { New-AzureADApplicationKeyCredential -ObjectId $ObjectId -Type AsymmetricX509Cert -Usage Verify -Value $CertBase64 -StartDate $now -EndDate $Cert.NotAfter}

            $CertificatesToBeMaintained.Add($appCredential.KeyId, $true)

            $userProvidedCertAddedToAAD = $true

            # Wait till the credential added is returned in Get to avoid the rush in using this new certificate. Gives more time for AAD replication before using certificate.

            $credReturned = Retry-Command -ScriptBlock { Get-AzureADApplicationKeyCredential -ObjectId $ObjectId | where {($_.KeyId -eq $appCredential.KeyId)} }

        }

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

        try

        {

            $SetCertParams = @{

                        ServiceEndpoint = $ServiceEndpoint

                        BillingServiceApiScope = $BillingServiceApiScope

                        GraphServiceApiScope = $GraphServiceApiScope

                        AADAuthority = $Authority

                        AppId = $AppId

                        TenantId = $TenantId

                        CloudId = $CloudId

                        CertificateThumbprint = $CertificateThumbprint

                    }

            Invoke-Command -Session $nodeSession -ScriptBlock { Set-AzureStackHCIRegistrationCertificate @Using:SetCertParams }

        }

        catch

        {

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

            Write-Debug $_

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

            continue

        }

    }

    return $null

}

function Create-ArcApplication{

param(

    [string] $AppName,

    [ref] $AppId,

    [ref] $Secret,

    [Switch] $IsWAC

    )

    Write-Verbose "Creating AAD Arc Agent Application $AppName"

    # Create application and service principal for Arc agent app.

    $app = Retry-Command -ScriptBlock { New-AzureADApplication -DisplayName $AppName }

    $sp = Retry-Command -ScriptBlock { New-AzureADServicePrincipal -AppId $app.AppId }

    # Usually takes 10-20 seconds after app creation to be able to assign roles. Can take upto 140 seconds for AAD to replicate in rare cases.

    $stopLoop = $false

    [int]$retryCount = "0"

    [int]$maxRetryCount = "14"

    do {

        try 

        {

            New-AzRoleAssignment -ObjectId $sp.ObjectId -RoleDefinitionName $AzureConnectedMachineOnboardingRole | Out-Null

            New-AzRoleAssignment -ObjectId $sp.ObjectId -RoleDefinitionName $AzureConnectedMachineResourceAdministratorRole | Out-Null

            $stopLoop = $true

            break

        }

        catch

        {

            $positionMessage = $_.InvocationInfo.PositionMessage

            if ($retryCount -ge $maxRetryCount)

            {

                # Cleanup

                Remove-AzureADApplication -ObjectId $app.ObjectId

                # Timed out.

                Write-Debug ("Failed to assign roles to service principal with App Id $($app.AppId). ErrorMessage: " + $_.Exception.Message + " PositionalMessage: " + $positionMessage)

                throw $_

            }

            if ($_.Exception.Message.Contains("Microsoft.Authorization/roleAssignments/write"))

            {

                # Cleanup

                Remove-AzureADApplication -ObjectId $app.ObjectId

                Write-Verbose "Create-ArcApplication Missing Permissions. IsWAC: $IsWAC"

                if($IsWAC -eq $false)

                {

                    # Insufficient privilige error.

                    Write-Error -Message $ArcAgentRolesInsufficientPreviligeMessage -ErrorAction Continue

                }

                return $false

            }

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

            Write-Verbose "Could not assign roles to service principal with App Id $($app.AppId). Retrying in 10 seconds..."

            Start-Sleep -Seconds 10

            $retryCount = $retryCount + 1

        }

    }

    While (-Not $stopLoop)

    # Set password to never expire.

    $start = Get-Date

    $end = $start.AddYears($IndefinitelyYears)

    $pw = Retry-Command -ScriptBlock { New-AzureADServicePrincipalPasswordCredential -ObjectId $sp.ObjectId -StartDate $start -EndDate $end }

    Write-Verbose "Created new AAD Arc Agent Application $($app.AppId)"

    $AppId.Value = $app.AppId

    $Secret.Value = $pw.Value

    return $true

}

function Remove-ArcApplication{

    param(

        [string] $AppId

        )

        $app = Get-AzureADApplication -Filter "AppId eq '$AppId'"

        $sp = Get-AzureADServicePrincipal -Filter "AppId eq '$AppId'"

        # Remove assigned roles.

        try

        {

            $roles = Get-AzRoleAssignment -ObjectId $sp.ObjectId

            $roles | ForEach-Object { 

                $roleName = $_.RoleDefinitionName

                if (($roleName -eq $AzureConnectedMachineOnboardingRole) -or ($roleName -eq $AzureConnectedMachineResourceAdministratorRole))

                {

                    Remove-AzRoleAssignment -ObjectId $sp.ObjectId -RoleDefinitionName $roleName | Out-Null

                }

            }

        }

        catch

        {

            Write-Warning -Message $ArcRolesCleaningWarningMessage

            Write-Debug ("Exception occured in clearing roles on service principal with App Id {0}. ErrorMessage : {1}" -f ($AppId), ($_.Exception.Message))

            Write-Debug $_

        }

        # Delete application.

        Remove-AzureADApplication -ObjectId $app.ObjectId

}

function Enable-ArcForServers{

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

            {

                Foreach ($node in $nodeStatus.Keys)

                {

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

                    {

                        Write-Warning -Message $using:RegisterArcFailedWarningMessage

                        $retStatus = [ErrorDetail]::ArcIntegrationFailedOnNodes

                        break

                    }

                }

            }

            else

            {

                Write-Warning -Message $using:RegisterArcFailedWarningMessage

                $retStatus = [ErrorDetail]::ArcIntegrationFailedOnNodes

            }

        }

    }

    catch

    {

        Write-Warning -Message $RegisterArcFailedWarningMessage

        $retStatus = [ErrorDetail]::ArcIntegrationFailedOnNodes

        Write-Debug ("Exception occured in registering nodes to Arc For Servers. ErrorMessage : {0}" -f ($_.Exception.Message))

        Write-Debug $_

    }

    # Cleanup sessions.

    Remove-PSSession $clusterNodeSessions | Out-Null

    return $retStatus

}

function Disable-ArcForServers{

param(

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

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

    [string] $ClusterDNSSuffix

    )

    $res = $true

    $AgentUninstaller_LogFile = "ConnectedMachineAgentUninstallationLog.txt";

    $AgentInstaller_Name      = "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

    }

    if((Get-AzureStackHCIArcIntegration).ClusterArcStatus -eq [ArcStatus]::Disabled)

    {

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

        Write-Debug $_

        $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-Error -Message $UnregisterArcFailedErrorMessage -ErrorAction Continue

            }

        }

    }

    # Cleanup sessions.

    Remove-PSSession $clusterNodeSessions | Out-Null

    return $res

}

function Register-ArcForServers{

param(

    [bool] $IsManagementNode,

    [string] $ComputerName,

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

    [string] $TenantId,

    [string] $SubscriptionId,

    [string] $ResourceGroup,

    [string] $Region,

    [string] $AppName,

    [string] $ClusterDNSSuffix,

    [Switch] $IsWAC

    )

    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

    }

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

    $clusterDNSName = Get-ClusterDNSName -Session $session

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

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

    $AppId = [string]::Empty

    $Secret = [string]::Empty

    # Register resource providers

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

    Register-AzResourceProvider -ProviderNamespace Microsoft.HybridCompute | Out-Null

    Register-AzResourceProvider -ProviderNamespace Microsoft.GuestConfiguration | Out-Null

    $arcAppId = $arcStatus.ApplicationId

    $shouldCreateApp = $true

    if(-Not [string]::IsNullOrEmpty($arcAppId))

    {

        $existingArcApp = Retry-Command -ScriptBlock { Get-AzureADApplication -Filter "AppId eq '$arcAppId'" } -RetryIfNullOutput $false

         if(($existingArcApp -ne $Null) -and ($arcStatus.ClusterArcStatus -eq [ArcStatus]::Enabled))

         {

            $shouldCreateApp = $false

         }

    }

    # Setup Arc agent.

    if ($shouldCreateApp)

    {

        # Create application.

        $CreatingAADAppMessageProgress = $CreatingAADAppMessage -f $AppName, $TenantId

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

        $appCreated = Create-ArcApplication -AppName $AppName -AppId ([ref]$appId) -Secret ([ref]$secret) -IsWAC:$IsWAC

        if($appCreated -eq $false)

        {

            return [ErrorDetail]::ArcPermissionsMissing

        }

        # Save Arc context.

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

        $ArcRegistrationParams = @{

            AppId = $AppId

            Secret = $Secret

            TenantId = $TenantId

            SubscriptionId = $SubscriptionId

            Region = $Region

            ResourceGroup = $ResourceGroup

        }

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

    }

    # Register clustered scheduled task

    try

    {

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

        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 -Cluster $Using:clusterName

            }

            else

            {

                # Update cluster schedule task.

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

            }

        } | Out-Null

    }

    catch

    {

        $positionMessage = $_.InvocationInfo.PositionMessage

        Write-Error ("Exception occured in registering cluster scheduled task. ErrorMessage: " + $_.Exception.Message + " PositionalMessage: " + $positionMessage) -Category OperationStopped

        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

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

    Remove-PSSession $session | Out-Null

    Write-Verbose "Successfully registered cluster with Arc for Servers."

    return $arcResult

}

function Unregister-ArcForServers{

param(

    [bool] $IsManagementNode,

    [string] $ComputerName,

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

    [string] $ResourceId,

    [Switch] $Force,

    [string] $ClusterDNSSuffix

    )

    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

    }

    $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)

    {

        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}

    }

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

    # Set aggregateState on HCI RP ArcSettings to DisableInProgress

    if(($arcres -ne $null) -and ($arcres.Properties.aggregateState -ne $ArcSettingsDisableInProgressState))

    {

        $disableProperties = @{"aggregateState" = $ArcSettingsDisableInProgressState}

        $arcres = New-AzResource -ResourceId $arcResourceId -ApiVersion $HCIArcAPIVersion -PropertyObject $disableProperties -Force

    }

    if($arcres -ne $null)

    {

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

    }

    $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]

            try

            {

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

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

                $PercentComplete = [Math]::Round( 2 + ((($extIndex+1)/($extensions.Count)) * $ProgressRange) )

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

                Remove-AzResource -ResourceId $extension.ResourceId -ApiVersion $HCIArcAPIVersion -Force -ErrorAction Stop | Out-Null

            }

            catch

            {

                $extensionsCleanupSucceeded = $false

                $positionMessage = $_.InvocationInfo.PositionMessage

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

                if($Force -eq $true)

                {

                    $ArcExtensionCleanupFailedWarningMsg = $ArcExtensionCleanupFailedWarning -f $extension.Name

                    Write-Warning $ArcExtensionCleanupFailedWarningMsg

                }

                else

                {

                    $ArcExtensionCleanupFailedErrorMsg = $ArcExtensionCleanupFailedError -f $extension.Name

                    Write-Error -Message $ArcExtensionCleanupFailedErrorMsg -ErrorAction Continue

                }

            }

        }

    }

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

    {

        return $false

    }

    # Clean up clustered scheduled task, if it exists.

    try

    {

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

        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

            if ($task)

            {

                Unregister-ClusteredScheduledTask -Cluster $Using:clusterName -TaskName $using:ArcRegistrationTaskName

            }

        } | Out-Null

    }

    catch

    {

        $positionMessage = $_.InvocationInfo.PositionMessage

        Write-Error ("Exception occured in unregistering cluster scheduled task. ErrorMessage: " + $_.Exception.Message + " PositionalMessage: " + $positionMessage) -Category OperationStopped

        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 -ErrorAction Ignore

        if($arcResource -ne $Null)

        {

            $DeletingArcCloudResourceMessageProgress = $DeletingArcCloudResourceMessage -f $arcResourceId

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

            Remove-AzResource -ResourceId $arcResourceId -Force | Out-Null

        }

        # Clean up Arc registry.

        $appId = $arcStatus.ApplicationId

        if (-Not [string]::IsNullOrEmpty($appId))

        {

            $app = Retry-Command -ScriptBlock { Get-AzureADApplication -Filter "AppId eq '$appId'" } -RetryIfNullOutput $false

            if($app -ne $Null)

            {

                $DeletingAADApplicationMessageProgress = $DeletingAADApplicationMessage -f $app.DisplayName

                Write-Progress -Id $ArcProgressBarId -ParentId $MainProgressBarId -Activity $UnregisterArcProgressActivityName -Status $DeletingAADApplicationMessageProgress -PercentComplete 50

                Remove-ArcApplication -AppId $appId

            }

        }

        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-Verbose "Successfully unregistered cluster from Arc for Servers"

        }

    }

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

    return $disabled

}

enum OperationStatus

{

    Unused;

    Failed;

    Success;

    PendingForAdminConsent;

    Cancelled;

    RegisterSucceededButArcFailed

}

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. This is the only Mandatory parameter.

    .PARAMETER Region

    Specifies the Region to create the resource. Default is EastUS.

    .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 GraphAccessToken and AccountId will avoid Azure interactive logon.

    .PARAMETER GraphAccessToken

    Specifies the Graph access token. Specifying this along with ArmAccessToken and AccountId will avoid Azure interactive logon.

    .PARAMETER AccountId

    Specifies the ARM access token. Specifying this along with ArmAccessToken and GraphAccessToken will avoid Azure interactive logon.

    .PARAMETER EnvironmentName

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

    .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 EnableAzureArcServer

    Specifying this parameter to $false will skip registering the cluster nodes with Arc for servers.

    .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.

    .OUTPUTS

    PSCustomObject. Returns following Properties in PSCustomObject

    Result: Success or Failed or PendingForAdminConsent or Cancelled.

    ResourceId: Resource ID of the resource created in Azure.

    PortalResourceURL: Azure Portal Resource URL.

    PortalAADAppPermissionsURL: Azure Portal URL for AAD App permissions page.

    .EXAMPLE

    Invoking on one of the cluster node.

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

    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

    PortalAADAppPermissionsURL: https://portal.azure.com/#blade/Microsoft_AAD_RegisteredApps/ApplicationMenuBlade/CallAnAPI/appId/980be58d-578c-4cff-b4cd-43e9c3a77826/isMSAApp/

    .EXAMPLE

    Invoking from the management node

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

    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

    PortalAADAppPermissionsURL: https://portal.azure.com/#blade/Microsoft_AAD_RegisteredApps/ApplicationMenuBlade/CallAnAPI/appId/950be58d-578c-4cff-b4cd-43e9c3a77866/isMSAApp/

    .EXAMPLE

    Invoking from WAC

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

    Result: PendingForAdminConsent

    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

    PortalAADAppPermissionsURL: https://portal.azure.com/#blade/Microsoft_AAD_RegisteredApps/ApplicationMenuBlade/CallAnAPI/appId/980be58d-578c-4cff-b4cd-43e9c3a77866/isMSAApp/

    .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 HciClusterRG -ArmAccessToken eerrer..ere= -GraphAccessToken acee..rerrer -AccountId user1@corp1.com -EnvironmentName AzureCloud -ComputerName node1hci -Credential Get-Credential

    Result: Success

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

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

    PortalAADAppPermissionsURL: https://portal.azure.com/#blade/Microsoft_AAD_RegisteredApps/ApplicationMenuBlade/CallAnAPI/appId/990be58d-578c-4cff-b4cd-43e9c3a77866/isMSAApp/

#>

function Register-AzStackHCI{

param(

    [Parameter(Mandatory = $true)]

    [string] $SubscriptionId,

    [Parameter(Mandatory = $false)]

    [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] $GraphAccessToken,

    [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)]

    [Switch]$EnableAzureArcServer = $true,

    [Parameter(Mandatory = $false)]

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

    [Parameter(Mandatory = $false)]

    [Switch]$IsWAC

    )

    try

    {

        Setup-Logging -LogFilePrefix "RegisterHCI"

        $registrationOutput = New-Object -TypeName PSObject

        $operationStatus = [OperationStatus]::Unused

        try

        {

            Import-PackageProvider -Name Nuget -MinimumVersion "2.8.5.201" -ErrorAction Stop

        }

        catch

        {

            Install-PackageProvider NuGet -Force | Out-Null

        }

        Show-LatestModuleVersion

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

        {

            $ComputerName = [Environment]::MachineName

            $IsManagementNode = $False

        }

        else

        {

            $IsManagementNode = $True

        }

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

        if($IsManagementNode)

        {

            if($Credential -eq $Null)

            {

                $clusterNodeSession = New-PSSession -ComputerName $ComputerName

            }

            else

            {

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

            }

        }

        else

        {

            $clusterNodeSession = New-PSSession -ComputerName localhost

        }

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

        if($RepairRegistration -eq $true)

        {

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

            {

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

                {

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

                }

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

                {

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

                }

            }

            else

            {

                Write-Error -Message $NoExistingRegistrationExistsErrorMessage

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

                Write-Output $registrationOutput

                return

            }

        }

        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;

        Invoke-Command -Session $clusterNodeSession -ScriptBlock $clusScript

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

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

        $clusterDNSSuffix = Get-ClusterDNSSuffix -Session $clusterNodeSession

        $clusterDNSName = Get-ClusterDNSName -Session $clusterNodeSession

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

        {

            if($getCluster -eq $Null)

            {

                $NoClusterErrorMessage = $NoClusterError -f $ComputerName

                Write-Error -Message $NoClusterErrorMessage

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

                Write-Output $registrationOutput

                return

            }

            else

            {

                $ResourceName = $getCluster.Name

            }

        }

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

        {

            $ResourceGroupName = $ResourceName + "-rg"

        }

        Write-Verbose "Register-AzStackHCI triggered - Region: $Region ResourceName: $ResourceName `

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

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

            RepairRegistration: $RepairRegistration EnableAzureArcServer: $EnableAzureArcServer IsWAC: $IsWAC"

        if(($EnvironmentName -eq $AzureChinaCloud) -and ($EnableAzureArcServer -eq $true))

        {

            Write-Error -Message $ArcIntegrationNotAvailableChinaCloudError

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

            Write-Output $registrationOutput

            return

        }

        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 $RegisterProgressActivityName -UseDeviceAuthentication $UseDeviceAuthentication -Region $Region

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

        Write-Verbose "ResourceId : $resourceId"

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

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

        if($resource -ne $null)

        {

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

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

            {

                $Region = $resourceLocation

            }

            elseif($Region -ne $resourceLocation)

            {

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

                Write-Error -Message $ResourceExistsInDifferentRegionErrorMessage

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

                Write-Output $registrationOutput

                return

            }

        }

        else

        {

            if($resGroup -eq $Null)

            {

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

                {

                    $Region = Get-DefaultRegion -EnvironmentName $EnvironmentName

                }

            }

            else

            {

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

                {

                    $Region = $resGroup.Location

                }

            }

        }

        # 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)

                {

                    # Already registered with same resource Id and resource exists

                    $appId = $resource.Properties.aadClientId

                    $appPermissionsPageUrl = Get-PortalAppPermissionsPageUrl -AppId $appId -TenantId $TenantId -EnvironmentName $EnvironmentName -Region $Region

                    $operationStatus = [OperationStatus]::Success

                }

                else

                {

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

                    $AlreadyRegisteredErrorMessage = $CloudResourceDoesNotExist -f $resourceId

                    Write-Error -Message $AlreadyRegisteredErrorMessage

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

                    Write-Output $registrationOutput

                    return

                }

            }

            else # Already registered with different resource Id

            {

                $AlreadyRegisteredErrorMessage = $RegisteredWithDifferentResourceId -f $RegContext.AzureResourceUri

                Write-Error -Message $AlreadyRegisteredErrorMessage

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

                Write-Output $registrationOutput

                return

            }

        }

        else

        {

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

            $regRP = Register-AzResourceProvider -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-Error -Message $RegionNotSupportedMessage

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

                Write-Output $registrationOutput

                return

            }

            # Lookup cloud endpoint URL from region name

            if($Region -eq $Region_EASTUSEUAP)

            {

                $ServiceEndpointAzureCloud = $ServiceEndpointsAzureCloud[$Region]

            }

            else

            {

                $ServiceEndpointAzureCloud = $ServiceEndpointAzureCloudFrontDoor

            }

            if($resource -eq $Null)

            {

                # Create new application

                $CreatingAADAppMessageProgress = $CreatingAADAppMessage -f $ResourceName, $TenantId

                Write-Progress -Id $MainProgressBarId -activity $RegisterProgressActivityName -status $CreatingAADAppMessageProgress -percentcomplete 50

                $appId = Create-Application -AppName $ResourceName

                $appPermissionsPageUrl = Get-PortalAppPermissionsPageUrl -AppId $appId -TenantId $TenantId -EnvironmentName $EnvironmentName -Region $Region

                Write-Verbose "Created AAD Application with Id $appId"

                # Create new resource by calling RP

                if($resGroup -eq $Null)

                {

                     $CreatingResourceGroupMessageProgress = $CreatingResourceGroupMessage -f $ResourceGroupName

                     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

                $properties = @{"aadClientId"="$appId";"aadTenantId"="$TenantId"}

                $resource = New-AzResource -ResourceId $resourceId -Location $Region -ApiVersion $RPAPIVersion -PropertyObject $properties -Tag $Tag -Force

                # Try Granting admin consent for requested permissions

                $GrantingAdminConsentMessageProgress = $GrantingAdminConsentMessage -f $ResourceName

                Write-Progress -Id $MainProgressBarId -activity $RegisterProgressActivityName -status $GrantingAdminConsentMessageProgress -percentcomplete 65

                $adminConsented = Grant-AdminConsent -AppId $appId

                if($adminConsented -eq $False)

                {

                    $AdminConsentWarningMsg = $AdminConsentWarning -f $ResourceName, $appPermissionsPageUrl

                    Write-Warning $AdminConsentWarningMsg

                    $operationStatus = [OperationStatus]::PendingForAdminConsent

                }

            }

            else

            {

                # Resource and Application exists. Check admin consent status

                $appId = $resource.Properties.aadClientId

                $appPermissionsPageUrl = Get-PortalAppPermissionsPageUrl -AppId $appId -TenantId $TenantId -EnvironmentName $EnvironmentName -Region $Region

                # Existing AAD app might not have the newly added scopes, if so add them.

                AddRequiredPermissionsIfNotPresent -AppId $appId

                $rolesPresent = Check-UsageAppRoles -AppId $appId

                $GrantingAdminConsentMessageProgress = $GrantingAdminConsentMessage -f $ResourceName

                Write-Progress -Id $MainProgressBarId -activity $RegisterProgressActivityName -status $GrantingAdminConsentMessageProgress -percentcomplete 65

                if($rolesPresent -eq $False)

                {

                    # Try Granting admin consent for requested permissions

                    $adminConsented = Grant-AdminConsent -AppId $appId

                    if($adminConsented -eq $False)

                    {

                        $AdminConsentWarningMsg = $AdminConsentWarning -f $ResourceName, $appPermissionsPageUrl

                        Write-Warning $AdminConsentWarningMsg

                        $operationStatus = [OperationStatus]::PendingForAdminConsent

                    }

                }

            }

            if($operationStatus -ne [OperationStatus]::PendingForAdminConsent)

            {

                # At this point Application should be created and consented by admin.

                $appId = $resource.Properties.aadClientId

                $cloudId = $resource.Properties.cloudId 

                $app = Retry-Command -ScriptBlock { Get-AzureADApplication -Filter "AppId eq '$appId'"}

                $objectId = $app.ObjectId

                $appSP = Retry-Command -ScriptBlock { Get-AzureADServicePrincipal -Filter "AppId eq '$appId'"}

                $spObjectId = $appSP.ObjectId

                # 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()

                $ServiceEndpoint = ""

                $Authority = ""

                $BillingServiceApiScope = ""

                $GraphServiceApiScope = ""

                Get-EnvironmentEndpoints -EnvironmentName $EnvironmentName -ServiceEndpoint ([ref]$ServiceEndpoint) -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

                if($setupCertsError -ne $null)

                {

                    Write-Error -Message $setupCertsError

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

                    Write-Output $registrationOutput

                    return

                }

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

                {

                    # Failed on atleast 1 node

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

                    Write-Error -Message $SettingCertificateFailedMessage

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

                    Write-Output $registrationOutput

                    return

                }

                if($OSNotLatestOnNodes.Count -ge 1)

                {

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

                    Write-Error -Message $NotAllTheNodesInClusterAreGAError

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

                    Write-Output $registrationOutput

                    return

                }

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

                # Register by calling on-prem usage service Cmdlet

                $RegistrationParams = @{

                                            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

                                        }

                Invoke-Command -Session $clusterNodeSession -ScriptBlock { Set-AzureStackHCIRegistration @Using:RegistrationParams }

                # Delete all certificates except certificates which we created in this current registration flow.

                if(($RepairRegistration -eq $true) -or (-Not ([string]::IsNullOrEmpty($CertificateThumbprint))) )

                {

                    $aadAppKeyCreds = Retry-Command -ScriptBlock {Get-AzureADApplicationKeyCredential -ObjectId $objectId}

                    Foreach ($keyCred in $aadAppKeyCreds)

                    {

                        if($CertificatesToBeMaintained[$keyCred.KeyId] -eq $true)

                        {

                            Write-Verbose ($SkippingDeleteCertificateFromAADApp -f $keyCred.KeyId)

                            continue

                        }

                        else

                        {

                            Write-Verbose ($DeletingCertificateFromAADApp -f $keyCred.KeyId)

                            Retry-Command -ScriptBlock { Remove-AzureADApplicationKeyCredential -ObjectId $objectId -KeyId $keyCred.KeyId} -RetryIfNullOutput $false

                        }

                    }

                }

                # Delete old unused scopes if present

                Remove-OldScopes -AppId $appId

                $operationStatus = [OperationStatus]::Success

            }

        }

        if (($operationStatus -ne [OperationStatus]::PendingForAdminConsent) -and ($EnableAzureArcServer -eq $true))

        {

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

            $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-Debug ("Exception occured in establishing new PSSession. ErrorMessage : " + $_.Exception.Message)

                    Write-Debug $_

                    $ArcCmdletsAbsentOnNodes.Add($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)

                {

                    $ArcCmdletsAbsentOnNodes.Add($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-Error -Message $ArcCmdletsNotAvailableErrorMsg

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

                Write-Output $registrationOutput

                return

            }

            $arcResourceId = $resourceId + $HCIArcInstanceName

            $arcResourceGroupName = $ResourceGroupName

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

            if($arcres -eq $null)

            {

                $arcres = New-AzResource -ResourceId $arcResourceId -ApiVersion $HCIArcAPIVersion -Force

            }

            else

            {

                if ($arcres.Properties.aggregateState -eq $ArcSettingsDisableInProgressState)

                {

                    Write-Error -Message $ArcRegistrationDisableInProgressError

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

                    Write-Output $registrationOutput

                    return

                }

            }

            $arcResourceGroupName = $arcres.Properties.arcInstanceResourceGroup

            $arcAppName = $ResourceName + ".arc"

            Write-Verbose "Register-AzStackHCI: Arc registration triggered. ArcResourceGroupName: $arcResourceGroupName"

            $arcResult = Register-ArcForServers -IsManagementNode $IsManagementNode -ComputerName $ComputerName -Credential $Credential -TenantId $TenantId -SubscriptionId $SubscriptionId -ResourceGroup $arcResourceGroupName -Region $Region -AppName $arcAppName -ClusterDNSSuffix $clusterDNSSuffix -IsWAC:$IsWAC

            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 $OutputPropertyPortalAADAppPermissionsURL -Value $appPermissionsPageUrl

        if($operationStatus -eq [OperationStatus]::PendingForAdminConsent)

        {

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

        }

        else

        {

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

        }

        Write-Output $registrationOutput

    }

    catch

    {

        Write-Error -Exception $_.Exception -Category OperationStopped -ErrorAction Continue

        # 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-Error ("Exception occured in Register-AzStackHCI : " + $positionMessage) -Category OperationStopped

        throw

    }

    finally

    {

        try{ Disconnect-AzAccount | Out-Null } catch{}

        try{ Disconnect-AzureAD | Out-Null } catch{}

        Stop-Transcript | out-null

    }

}

<#

    .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 GraphAccessToken and AccountId will avoid Azure interactive logon.

    .PARAMETER GraphAccessToken

    Specifies the Graph access token. Specifying this along with ArmAccessToken and AccountId will avoid Azure interactive logon.

    .PARAMETER AccountId

    Specifies the ARM access token. Specifying this along with ArmAccessToken and GraphAccessToken will avoid Azure interactive logon.

    .PARAMETER EnvironmentName

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

    .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= -GraphAccessToken acyee..rerrer -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= -GraphAccessToken acee..rerrer -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] $GraphAccessToken,

    [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

    )

    try

    {

        Setup-Logging -LogFilePrefix "UnregisterHCI"

        $unregistrationOutput = New-Object -TypeName PSObject

        $operationStatus = [OperationStatus]::Unused

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

        {

            $ComputerName = [Environment]::MachineName

            $IsManagementNode = $False

        }

        else

        {

            $IsManagementNode = $True

        }

        Write-Progress -Id $MainProgressBarId -activity $UnregisterProgressActivityName -status $FetchingRegistrationState -percentcomplete 1

        if($IsManagementNode)

        {

            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

        $clusterDNSName = Get-ClusterDNSName -Session $clusterNodeSession

        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-Error -Message $RegistrationInfoNotFound

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

                Write-Output $unregistrationOutput

                return

            }

        }

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

        {

            $SubscriptionId = $RegContext.AzureResourceUri.Split('/')[2]

        }

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

        {

            $ResourceGroupName = If ($RegContext.RegistrationStatus -ne [RegistrationStatus]::Registered) { $ResourceName + "-rg" } Else { $RegContext.AzureResourceUri.Split('/')[4] }

        }

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

        {

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

        }

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

        if ($PSCmdlet.ShouldProcess($resourceId))

        {

            Write-Verbose "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

                return

            }

            else

            {

                if ($DisableOnlyAzureArcServer -eq $true)

                {

                    $unregistrationOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyResult -Value [OperationStatus]::Success

                    Write-Output $unregistrationOutput

                    return

                }

            }

            Write-Progress -Id $MainProgressBarId -activity $UnregisterProgressActivityName -status $UnregisterHCIUsageMessage -percentcomplete 45

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

            {

                Invoke-Command -Session $clusterNodeSession -ScriptBlock { Remove-AzureStackHCIRegistration }

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

                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

                        }

                        if([Environment]::MachineName -eq $clusNode.Name)

                        {

                            Remove-AzureStackHCIRegistrationCertificate

                        }

                        else

                        {

                            Invoke-Command -Session $nodeSession -ScriptBlock { Remove-AzureStackHCIRegistrationCertificate }

                        }

                    }

                    catch

                    {

                        Write-Warning ($FailedToRemoveRegistrationCertWarning -f $clusNode.Name)

                        Write-Debug ("Exception occured in clearing certificate on {0}. ErrorMessage : {1}" -f ($clusNode.Name), ($_.Exception.Message))

                        Write-Debug $_

                        continue

                    }

                }

            }

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

            if($resource -ne $Null)

            {

                $appId = $resource.Properties.aadClientId

                $app = Retry-Command -ScriptBlock { Get-AzureADApplication -Filter "AppId eq '$appId'"} -RetryIfNullOutput $false

                if($app -ne $Null)

                {

                    $DeletingAADApplicationMessageProgress = $DeletingAADApplicationMessage -f $ResourceName

                    Write-Progress -Id $MainProgressBarId -activity $UnregisterProgressActivityName -status $DeletingAADApplicationMessageProgress -percentcomplete 60

                    Retry-Command -ScriptBlock { Remove-AzureADApplication -ObjectId $app.ObjectId} -RetryIfNullOutput $false

                }

                $DeletingCloudResourceMessageProgress = $DeletingCloudResourceMessage -f $ResourceName

                Write-Progress -Id $MainProgressBarId -activity $UnregisterProgressActivityName -status $DeletingCloudResourceMessageProgress -percentcomplete 80

                $remResource = Remove-AzResource -ResourceId $resourceId -Force

            }

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

            if($resGroup -ne $Null)

            {

                $resGroupTags = $resGroup.Tags

                if($resGroupTags -ne $null)

                {

                    $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($resourcesInRG -eq $null) # Resource group is empty

                        {

                            Remove-AzResourceGroup -Name $ResourceGroupName -Force | Out-Null

                        }

                    }

                }

            }

            $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-Output $unregistrationOutput

    }

    catch

    {

        Write-Error -Exception $_.Exception -Category OperationStopped -ErrorAction Continue

        # 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-Error ("Exception occured in Unregister-AzStackHCI : " + $positionMessage) -Category OperationStopped

        throw

    }

    finally

    {

        try{ Disconnect-AzAccount | Out-Null } catch{}

        try{ Disconnect-AzureAD | Out-Null } catch{}

        Stop-Transcript | out-null

    }

}

<#

    .Description

    Test-AzStackHCIConnection verifies connectivity from on-premises clustered nodes to the Azure services required by Azure Stack HCI.

    .PARAMETER EnvironmentName

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

    .PARAMETER Region

    Specifies the Region to connect to. Not used unless it is Canary region.

    .PARAMETER ComputerName

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

    .PARAMETER Credential

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

    .OUTPUTS

    PSCustomObject. Returns following Properties in PSCustomObject

    Test: Name of the test performed.

    EndpointTested: Endpoint used in the test.

    IsRequired: True or False

    Result: Succeeded or Failed

    FailedNodes: List of nodes on which the test failed.

    .EXAMPLE

    Invoking on one of the cluster node. Success case.

    C:\PS>Test-AzStackHCIConnection

    Test: Connect to Azure Stack HCI Service

    EndpointTested: https://azurestackhci-df.azurefd.net/health

    IsRequired: True

    Result: Succeeded

    .EXAMPLE

    Invoking on one of the cluster node. Failed case.

    C:\PS>Test-AzStackHCIConnection

    Test: Connect to Azure Stack HCI Service

    EndpointTested: https://azurestackhci-df.azurefd.net/health

    IsRequired: True

    Result: Failed

    FailedNodes: Node1inClus2, Node2inClus3

#>

function Test-AzStackHCIConnection{

param(

    [Parameter(Mandatory = $false)]

    [string] $EnvironmentName = $AzureCloud,

    [Parameter(Mandatory = $false)]

    [string] $Region,

    [Parameter(Mandatory = $false)]

    [string] $ComputerName,

    [Parameter(Mandatory = $false)]

    [System.Management.Automation.PSCredential] $Credential

    )

    try

    {

        Setup-Logging -LogFilePrefix "TestAzStackHCIConnection"

        $testConnectionnOutput = New-Object -TypeName PSObject

        $connectionTestResult = [ConnectionTestResult]::Unused

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

        {

            $ComputerName = [Environment]::MachineName

            $IsManagementNode = $False

        }

        else

        {

            $IsManagementNode = $True

        }

        if($IsManagementNode)

        {

            if($Credential -eq $Null)

            {

                $clusterNodeSession = New-PSSession -ComputerName $ComputerName

            }

            else

            {

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

            }

        }

        else

        {

            $clusterNodeSession = New-PSSession -ComputerName localhost

        }

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

        {

            $Region = Normalize-RegionName -Region $Region

            if($Region -eq $Region_EASTUSEUAP)

            {

                $ServiceEndpointAzureCloud = $ServiceEndpointsAzureCloud[$Region]

            }

            else

            {

                $ServiceEndpointAzureCloud = $ServiceEndpointAzureCloudFrontDoor

            }

        }

        $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

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

        $clusterDNSSuffix = Get-ClusterDNSSuffix -Session $clusterNodeSession

        $clusterDNSName = Get-ClusterDNSName -Session $clusterNodeSession

        if($getCluster -eq $Null)

        {

            $NoClusterErrorMessage = $NoClusterError -f $ComputerName

            Write-Error -Message $NoClusterErrorMessage

            return

        }

        else

        {

            $ServiceEndpoint = ""

            $Authority = ""

            $BillingServiceApiScope = ""

            $GraphServiceApiScope = ""

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

            $EndPointToInvoke = $ServiceEndpoint + $HealthEndpointPath

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

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

            $testConnectionnOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyTest -Value $ConnectionTestToAzureHCIServiceName

            $testConnectionnOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyEndpointTested -Value $EndPointToInvoke

            $testConnectionnOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyIsRequired -Value $True

            Check-ConnectionToCloudBillingService -ClusterNodes $clusterNodes -Credential $Credential -HealthEndpoint $EndPointToInvoke -HealthEndPointCheckFailedNodes $HealthEndPointCheckFailedNodes -ClusterDNSSuffix $clusterDNSSuffix

            if($HealthEndPointCheckFailedNodes.Count -ge 1)

            {

                # Failed on atleast 1 node

                $connectionTestResult = [ConnectionTestResult]::Failed

                $testConnectionnOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyFailedNodes -Value $HealthEndPointCheckFailedNodes

            }

            else

            {

                $connectionTestResult = [ConnectionTestResult]::Succeeded

            }

            $testConnectionnOutput | Add-Member -MemberType NoteProperty -Name $OutputPropertyResult -Value $connectionTestResult

            Write-Output $testConnectionnOutput

            return

        }

    }

    catch

    {

        Write-Error -Exception $_.Exception -Category OperationStopped -ErrorAction Continue

        # 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-Error ("Exception occured in Test-AzStackHCIConnection : " + $positionMessage) -Category OperationStopped

        throw

    }

    finally

    {

        Stop-Transcript | out-null

    }

}

Export-ModuleMember -Function Register-AzStackHCI

Export-ModuleMember -Function Unregister-AzStackHCI

Export-ModuleMember -Function Test-AzStackHCIConnection

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