Export-Permission.ps1

<#PSScriptInfo
 
.VERSION 0.0.379
 
.GUID fd2d03cf-4d29-4843-bb1c-0fba86b0220a
 
.AUTHOR Jeremy La Camera
 
.COMPANYNAME Jeremy La Camera
 
.COPYRIGHT (c) Jeremy La Camera. All rights reserved.
 
.TAGS adsi ldap winnt ntfs acl
 
.LICENSEURI https://github.com/IMJLA/Export-Permission/blob/main/LICENSE
 
.PROJECTURI https://github.com/IMJLA/Export-Permission
 
.ICONURI
 
.EXTERNALMODULEDEPENDENCIES
 
.REQUIREDSCRIPTS
 
.EXTERNALSCRIPTDEPENDENCIES
 
.RELEASENOTES
fix testsdir
 
.PRIVATEDATA
 
#>
 

#Requires -Module PsDfs
#Requires -Module Adsi
#Requires -Module Permission
#Requires -Module PsBootstrapCss
#Requires -Module PsLogMessage
#Requires -Module PsNtfs
#Requires -Module PsRunspace
#Requires -Module SimplePrtg







<#
.SYNOPSIS
    Create CSV, HTML, and XML reports of permissions
.DESCRIPTION
    Present complex nested permissions and group memberships in a report that is easy to read
    Provide additional information about each account such as Name, Department, Title
    Multithreaded with caching for fast results
    Works as a scheduled task
    Works as a custom sensor script for Paessler PRTG Network Monitor (Push sensor recommended due to execution time)
 
    Supports:
    - Local folder paths
    - UNC folder paths
    - DFS folder paths
    - Mapped network drives
    - Active Directory domain trusts
    - Unresolved SIDs for deleted accounts
    - Group memberships via the Primary Group as well as the memberOf property
 
    Does not support these scenarios:
    - ACL Owners or Groups (ToDo enhancement; for now only the DACL is reported)
    - File permissions (ToDo enhancement; for now only folder permissions are reported)
    - Share permissions (ToDo enhancement; for now only NTFS permissions are reported)
 
    Behavior:
    - Resolves each path in the TargetPath parameter
      - Local paths become UNC paths using the administrative shares, so the computer name is shown in reports
      - DFS paths become all of their UNC folder targets, including disabled ones
      - Mapped network drives become their UNC paths
    - Gets all permissions for the resolved paths
    - Gets non-inherited permissions for subfolders (if specified)
    - Exports the permissions to a .csv file
    - Uses ADSI to get information about the accounts and groups listed in the permissions
    - Exports information about the accounts and groups to a .csv file
    - Uses ADSI to recursively retrieve group members
      - Retrieves group members using both the memberOf and primaryGroupId attributes
      - Members of nested groups are retrieved as members of the group listed in the permissions.
          - Their hierarchy of nested group memberships is not retrieved (for performance reasons).
    - Exports information about all accounts with access to a .csv file
    - Exports information about all accounts with access to a report generated as a .html file
    - Outputs an XML-formatted list of common misconfigurations for use in Paessler PRTG Network Monitor as a custom XML sensor
.INPUTS
    [System.IO.DirectoryInfo[]] TargetPath parameter
 
    Strings can be passed to this parameter and will be re-cast as DirectoryInfo objects.
.OUTPUTS
    [System.String] XML output formatted for a Custom XML Sensor in Paessler PRTG Network Monitor
.NOTES
    This code has not been reviewed or audited by a third party
 
    This code has limited or no tests
 
    It was designed for presenting reports to non-technical management or administrative staff
 
    It is convenient for that purpose but it is not recommended for compliance reporting or similar formal uses
 
    ToDo bugs/enhancements: https://github.com/IMJLA/Export-Permission/issues
.EXAMPLE
    Export-Permission.ps1 -TargetPath C:\Test
 
    Generate reports on the NTFS permissions for the folder C:\Test and all subfolders
.EXAMPLE
    Export-Permission.ps1 -TargetPath C:\Test -ExcludeAccount 'BUILTIN\\Administrator'
 
    Generate reports on the NTFS permissions for the folder C:\Test and all subfolders
 
    Exclude the built-in Administrator account from the HTML report
 
    The ExcludeAccount parameter uses RegEx, so the \ in BUILTIN\Administrator needed to be escaped.
 
    The RegEx escape character is \ so the regular expression needed for the parameter is 'BUILTIN\\Administrator'
.EXAMPLE
    Export-Permission.ps1 -TargetPath C:\Test -ExcludeAccount @(
        'BUILTIN\\Administrators',
        'BUILTIN\\Administrator',
        'CREATOR OWNER',
        'NT AUTHORITY\\SYSTEM'
    )
 
    Generate reports on the NTFS permissions for the folder C:\Test and all subfolders
 
    Exclude from the HTML report:
    - The built-in Administrator account
    - The built-in Administrators group and its members (unless they appear elsewhere in the permissions)
    - The CREATOR OWNER security principal
    - The computer account (NT AUTHORITY\SYSTEM)
 
    Note: CREATOR OWNER will still be reported as an alarm in the PRTG XML output
.EXAMPLE
    Export-Permission.ps1 -TargetPath C:\Test -ExcludeClass @('computer')
 
    Generate reports on the NTFS permissions for the folder C:\Test and all subfolders
 
    Include empty groups on the HTML report (rather than the default setting which would exclude computers and groups)
.EXAMPLE
    Export-Permission.ps1 -TargetPath C:\Test -NoGroupMembers -ExcludeClass @('computer')
 
    Generate reports on the NTFS permissions for the folder C:\Test
 
    Do not spend time retrieving group members
 
    Include groups on the report, but exclude computers (rather than the default setting which would exclude computers and groups)
.EXAMPLE
    Export-Permission.ps1 -TargetPath C:\Test -IgnoreDomain 'CONTOSO'
 
    Generate reports on the NTFS permissions for the folder C:\Test and all subfolders
 
    Remove the CONTOSO domain prefix from associated accounts and groups
.EXAMPLE
    Export-Permission.ps1 -TargetPath C:\Test -IgnoreDomain 'CONTOSO1','CONTOSO2'
 
    Generate reports on the NTFS permissions for the folder C:\Test and all subfolders
 
    Remove the CONTOSO1\ and CONTOSO2\ domain prefixes from associated accounts and groups
 
    Across the two domains, accounts with the same samAccountNames will be considered equivalent
 
    Across the two domains, groups with the same Names will be considered equivalent
.EXAMPLE
    Export-Permission.ps1 -TargetPath C:\Test -LogDir C:\Logs
 
    Generate reports on the NTFS permissions for the folder C:\Test and all subfolders
 
    Redirect logs and output files to C:\Logs instead of the default location in AppData
.EXAMPLE
    Export-Permission.ps1 -TargetPath C:\Test -RecurseDepth 0
 
    Generate reports on the NTFS permissions for the folder C:\Test only (no subfolders)
.EXAMPLE
    Export-Permission.ps1 -TargetPath C:\Test -RecurseDepth 2
 
    Generate reports on the NTFS permissions for the folder C:\Test
 
    Only include subfolders to a maximum of 2 levels deep (C:\Test\Level1\Level2)
.EXAMPLE
    Export-Permission.ps1 -TargetPath C:\Test -Title 'New Custom Report Title'
 
    Generate reports on the NTFS permissions for the folder C:\Test and all subfolders
 
    Change the title of the HTML report to 'New Custom Report Title'
.EXAMPLE
    Export-Permission.ps1 -TargetPath '\\ad.contoso.com\DfsNamespace\DfsFolderWithTarget'
 
    The target path is a DFS folder with folder targets
 
    Generate reports on the NTFS permissions for the DFS folder targets associated with this path
.EXAMPLE
    Export-Permission.ps1 -TargetPath '\\ad.contoso.com\DfsNamespace\DfsFolderWithoutTarget\DfsSubfolderWithoutTarget\DfsSubfolderWithTarget'
 
    The target path is a DFS subfolder with folder targets
 
    Generate reports on the NTFS permissions for the DFS folder targets associated with this path
.EXAMPLE
    Export-Permission.ps1 -TargetPath '\\ad.contoso.com\DfsNamespace\DfsFolderWithoutTarget\DfsSubfolderWithoutTarget\DfsSubfolderWithTarget\Subfolder'
 
    The target path is a subfolder of a DFS subfolder with folder targets
 
    Generate reports on the NTFS permissions for the DFS folder targets associated with this path
.EXAMPLE
    Export-Permission.ps1 -TargetPath '\\ad.contoso.com\'
 
    This is an edge case that is not currently supported
 
    The target path is the root of an AD domain
 
    Generate reports on the NTFS permissions for the root of an AD domain. TODO: param validation? or otherwise handle error.
.EXAMPLE
    Export-Permission.ps1 -TargetPath '\\computer.ad.contoso.com\'
 
    This is an edge case that is not currently supported
 
    The target path is the root of a SMB server
 
    Generate reports on the NTFS permissions for the root of a SMB server. TODO: param validation? or otherwise handle error.
.EXAMPLE
    Export-Permission.ps1 -TargetPath '\\ad.contoso.com\DfsNamespace'
 
    This is an edge case that is not currently supported
 
    The target path is a DFS namespace
 
    Generate reports on the NTFS permissions for the folder on the DFS namespace server associated with this path
 
    Add a warning that they are permissions from the DFS namespace server and could be confusing
.EXAMPLE
    Export-Permission.ps1 -TargetPath '\\ad.contoso.com\DfsNamespace\DfsFolderWithoutTarget'
 
    This is an edge case that is not currently supported.
 
    The target path is a DFS folder without a folder target
 
    Generate reports on the NTFS permissions for the folder on the DFS namespace server associated with this path
 
    Add a warning that they are permissions from the DFS namespace server and could be confusing
.EXAMPLE
    Export-Permission.ps1 -TargetPath '\\ad.contoso.com\DfsNamespace\DfsFolderWithoutTarget\DfsSubfolderWithoutTarget'
 
    This is an edge case that is not currently supported.
 
    The target path is a DFS subfolder without a folder target.
 
    Generate reports on the NTFS permissions for the folder on the DFS namespace server associated with this path
 
    Add a warning that they are permissions from the DFS namespace server and could be confusing
#>


param (

    <#
    Path to the NTFS folder whose permissions to export
 
    Currently supports NTFS folders
    TODO: support same targets as Get-Acl (AD, Registry, StorageSubSystem)
    #>

    [Parameter(ValueFromPipeline)]
    [ValidateScript({ Test-Path $_ })]
    [System.IO.DirectoryInfo[]]$TargetPath,

    # Regular expressions matching names of security principals to exclude from the HTML report
    [string[]]$ExcludeAccount = 'SYSTEM',

    <#
    Regular expressions matching names of security principals to include in the HTML report
 
    Only security principals with names matching these regular expressions will be returned
    #>

    [string[]]$IncludeAccount,

    <#
    Accounts whose objectClass property is in this list are excluded from the HTML report
 
    Note on the 'group' class:
      By default, a group with members is replaced in the report by its members unless the -NoGroupMembers switch is used.
      Any remaining groups are empty and not useful to see in the middle of a list of users/job titles/departments/etc).
      So the 'group' class is excluded here by default.
    #>

    [string[]]$ExcludeClass = @('group', 'computer'),

    <#
    Domain(s) to ignore (they will be removed from the username)
 
    Can be used:
      to ensure accounts only appear once on the report when they have matching SamAccountNames in multiple domains.
      when the domain is often the same and doesn't need to be displayed
    #>

    [string[]]$IgnoreDomain,

    # Path to the folder to save the logs and reports generated by this script
    [string]$OutputDir = "$env:AppData\Export-Permission",

    <#
    Do not get group members (only report the groups themselves)
 
    Note: By default, the -ExcludeClass parameter will exclude groups from the report.
      If using -NoGroupMembers, you most likely want to modify the value of -ExcludeClass.
      Remove the 'group' class from ExcludeClass in order to see groups on the report.
    #>

    [switch]$NoMembers,

    <#
    How many levels of children to enumerate
 
      Set to 0 to ignore all children
      Set to -1 (default) to recurse through all children
      Set to any whole number to enumerate that many levels of children
    #>

    [int]$RecurseDepth = -1,

    # Title at the top of the HTML report
    [string]$Title = 'Permissions Report',

    <#
    Valid accounts that are allowed to appear in ACEs
 
    Specify as a ScriptBlock meant for the FilterScript parameter of Where-Object
 
    By default, this is a ScriptBlock that always evaluates to $true so it doesn't evaluate any account convention compliance
 
    In the ScriptBlock, any account properties are available for evaluation:
 
    e.g. {$_.DomainNetbios -eq 'CONTOSO'} # Accounts used in ACEs should be in the CONTOSO domain
    e.g. {$_.Name -eq 'Group23'} # Accounts used in ACEs should be named Group23
    e.g. {$_.ResolvedAccountName -like 'CONTOSO\Group1*' -or $_.ResolvedAccountName -eq 'CONTOSO\Group23'}
 
    The format of the ResolvedAccountName property is CONTOSO\Group1
      where
        CONTOSO is the NetBIOS name of the domain (the computer name for local accounts)
        and
        Group1 is the samAccountName of the account
    #>

    [scriptblock]$AccountConvention = { $true },

    # Number of asynchronous threads to use
    # Recommended starting with the # of logical CPUs (Get-CimInstance -ClassName CIM_Processor | Measure-Object -Sum -Property NumberOfLogicalProcessors).Sum
    [uint16]$ThreadCount = 1,

    # Open the HTML report after the script is finished using Invoke-Item (only useful interactively)
    [switch]$Interactive,

    <#
    If all four of the PRTG parameters are specified,
 
    the results will be XML-formatted and pushed to the specified PRTG probe for a push sensor
    #>

    [string]$PrtgProbe,

    <#
    If all four of the PRTG parameters are specified,
 
    the results will be XML-formatted and pushed to the specified PRTG probe for a push sensor
    #>

    [string]$PrtgProtocol,

    <#
    If all four of the PRTG parameters are specified,
 
    the results will be XML-formatted and pushed to the specified PRTG probe for a push sensor
    #>

    [uint16]$PrtgPort,

    <#
    If all four of the PRTG parameters are specified,
 
    the results will be XML-formatted and pushed to the specified PRTG probe for a push sensor
    #>

    [string]$PrtgToken,

    <#
    How to split up the exported files:
        none generate 1 report file with all permissions
        target generate 1 report file per target (default)
        item generate 1 report file per item
        account generate 1 report file per account
        all generate 1 report file per target and 1 file per item and 1 file per account and 1 file with all permissions.
    #>

    [ValidateSet('account', 'item', 'none', 'target')]
    [string[]]$SplitBy = 'target',

    <#
    How to group the permissions in the output stream and within each exported file
 
        SplitBy GroupBy
        none none $FlatPermissions all in 1 file
        none account $AccountPermissions all in 1 file
        none item $ItemPermissions all in 1 file
 
        account none 1 file per item in $AccountPermissions. In each file, $_.Access | sort path
        account account (same as -SplitBy account -GroupBy none)
        account item 1 file per item in $AccountPermissions. In each file, $_.Access | group item | sort name
 
        item none 1 file per item in $ItemPermissions. In each file, $_.Access | sort account
        item account 1 file per item in $ItemPermissions. In each file, $_.Access | group account | sort name
        item item (same as -SplitBy item -GroupBy none)
 
        target none 1 file per $TargetPath. In each file, sort ACEs by item path then account name
        target account 1 file per $TargetPath. In each file, group ACEs by account and sort by account name
        target item 1 file per $TargetPath. In each file, group ACEs by item and sort by item path
        target target (same as -SplitBy target -GroupBy none)
    #>

    [ValidateSet('account', 'item', 'none', 'target')]
    [string]$GroupBy = 'item',

    # File format(s) to export
    [ValidateSet('csv', 'html', 'js', 'json', 'prtgxml', 'xml')]
    [string[]]$FileFormat = 'js',

    # Type of output returned to the output stream
    [ValidateSet('passthru', 'none', 'csv', 'html', 'js', 'json', 'prtgxml', 'xml')]
    [string]$OutputFormat = 'passthru',

    <#
    Level of detail to export to file
        0 Item paths
        1 Resolved item paths (server names resolved, DFS targets resolved)
        2 Expanded resolved item paths (parent paths expanded into children)
        3 Access lists
        4 Access rules (server names resolved, inheritance flags resolved)
        5 Accounts with access
        6 Expanded access rules (expanded with account info)
        7 Formatted permissions
        8 Best Practice issues
        9 Custom sensor output for Paessler PRTG Network Monitor
        10 Permission Report
    #>

    [int[]]$Detail = 10,

    # String translations indexed by value in the [System.Security.AccessControl.InheritanceFlags] enum
    # Parameter default value is on a single line as a workaround to a PlatyPS bug
    # TODO: Move to i18n
    [string[]]$InheritanceFlagResolved = @('this folder but not subfolders', 'this folder and subfolders', 'this folder and files, but not subfolders', 'this folder, subfolders, and files'),

    # Workaround for https://github.com/PowerShell/PowerShell/issues/20657
    [switch]$NoProgress

)

begin {

    # To avoid generating inaccurate reports, halt the script upon encountering any errors.
    $ErrorActionPreference = 'Stop'

    # Workaround for https://github.com/PowerShell/PowerShell/issues/20657
    if ($NoProgress) {
        $ProgressPreference = 'Ignore'
    }

    # Create a splat of the constant Write-Progress parameters for script readability.
    $Progress = @{
        Activity = 'Export-Permission'
        Id       = 0
    }

    # Create a splat of the variable Write-Progress parameters for script readability.
    $ProgressUpdate = @{
        CurrentOperation = 'Initializing'
        PercentComplete  = 0
        Status           = '0% (step 1 of 20)'
    }

    # Start the progress bar
    Write-Progress @Progress @ProgressUpdate

    #----------------[ Functions ]------------------

    # This is where the function definitions will be inserted in the portable version of this script.

    #----------------[ Logging ]----------------

    # Start a timer to measure progress and performance.
    $StopWatch = [System.Diagnostics.Stopwatch]::new()
    $null = $StopWatch.Start()

    # Generate a unique ID for this run of the script.
    $ReportInstanceId = [guid]::NewGuid().ToString()

    # Create a folder to store logs.
    $OutputDir = New-DatedSubfolder -Root $OutputDir -Suffix "_$ReportInstanceId"

    <# Start the PowerShell transcript.
        PowerShell cannot redirect the Success stream of Start-Transcript to the Information stream
        But it can redirect it to $null, and then send the Transcript file path to Write-Information
    #>

    $TranscriptFile = "$OutputDir\PowerShellTranscript.log"
    Start-Transcript $TranscriptFile *>$null
    Write-Information $TranscriptFile

    #----------------[ Declarations ]----------------

    $LogFile = "$OutputDir\Export-Permission.log"
    $DirectoryEntryCache = [hashtable]::Synchronized(@{}) # Initialize a cache of ADSI directory entry keyed by their Path to minimize ADSI queries.
    $DomainsBySID = [hashtable]::Synchronized(@{}) # Initialize a cache of directory domains keyed by domain SID to minimize CIM and ADSI queries.
    $DomainsByNetbios = [hashtable]::Synchronized(@{}) # Initialize a cache of directory domains keyed by domain NetBIOS to minimize CIM and ADSI queries.
    $DomainsByFqdn = [hashtable]::Synchronized(@{}) # Initialize a cache of directory domains keyed by domain DNS FQDN to minimize CIM and ADSI queries.
    $LogBuffer = [hashtable]::Synchronized(@{}) # Initialize a cache of log messages in memory to minimize random disk access.
    $CimCache = [hashtable]::Synchronized(@{}) # Initialize a cache of CIM sessions, instances, and query results.
    $AclByPath = [hashtable]::Synchronized(@{}) # Initialize a cache of access control lists keyed by their paths.
    $AceByGUID = [hashtable]::Synchronized(@{}) # Initialize a cache of access control entries keyed by GUID generated in Resolve-ACE.
    $AceGuidByID = [hashtable]::Synchronized(@{}) # Initialize a cache of access control entry GUIDs keyed by their resolved identities.
    $AceGuidByPath = [hashtable]::Synchronized(@{}) # Initialize a cache of access control entry GUIDs keyed by their paths.
    $PrincipalByID = [hashtable]::Synchronized(@{}) # Initialize a cache of ADSI security principals keyed by their resolved NTAccount caption.
    $Parents = [hashtable]::Synchronized(@{}) # Initialize a cache of resolved parent item paths keyed by their unresolved target paths.
    $IdByShortName = [hashtable]::Synchronized(@{}) # Initialize a cache of resolved NTAccount captions keyed by their short names (results of the IgnoreDomain parameter).
    $ShortNameByID = [hashtable]::Synchronized(@{}) # Initialize a cache of short names (results of the IgnoreDomain parameter) keyed by their resolved NTAccount captions.
    $ExcludeClassFilterContents = [hashtable]::Synchronized(@{}) # Initialize a cache of accounts filtered by the ExcludeClass parameter.
    $IncludeAccountFilterContents = [hashtable]::Synchronized(@{}) # Initialize a cache of accounts filtered by the IncludeAccount parameter.
    $ExcludeAccountFilterContents = [hashtable]::Synchronized(@{}) # Initialize a cache of accounts filtered by the ExcludeAccount parameter.

    # Get the hostname of the computer running the script
    $ThisHostname = HOSTNAME.EXE

    # Get the NTAccount caption of the user running the script, with the correct capitalization
    $WhoAmI = Get-CurrentWhoAmI -Buffer $LogBuffer -ThisHostName $ThisHostname

    # Create a splat of the ThreadCount parameter to pass to various functions for script readability
    $Threads = @{ ThreadCount = $ThreadCount }

    # Create a splat of log-related parameters to pass to various functions for script readability
    $LogThis = @{
        ThisHostname = $ThisHostname
        LogBuffer    = $LogBuffer
        WhoAmI       = $WhoAmI
    }

    # Create a splat of constant Write-LogMsg parameters for script readability
    $Log = @{
        ThisHostname = $ThisHostname
        Type         = 'Debug'
        Buffer       = $LogBuffer
        WhoAmI       = $WhoAmI
    }

    # These events already happened but we will log them now that we have the correct capitalization of the user
    Write-LogMsg @Log -Text '$LogBuffer = [hashtable]::Synchronized(@{})'
    Write-LogMsg @Log -Text '$ThisHostname = HOSTNAME.EXE'
    Write-LogMsg @Log -Text "`$WhoAmI = Get-CurrentWhoAmI -ThisHostName '$ThisHostname' -Buffer `$LogBuffer"

    # Get the FQDN of the computer running the script
    Write-LogMsg @Log -Text "`$ThisFqdn = ConvertTo-DnsFqdn -ComputerName '$ThisHostName' -Expand $LogThis"
    $ThisFqdn = ConvertTo-DnsFqdn -ComputerName $ThisHostName @LogThis

    # Create a splat of caching-related parameters to pass to various functions for script readability
    $CacheParams = @{
        DirectoryEntryCache = $DirectoryEntryCache
        DomainsByFqdn       = $DomainsByFqdn
        DomainsByNetbios    = $DomainsByNetbios
        DomainsBySid        = $DomainsBySid
        ThisFqdn            = $ThisFqdn
        ThreadCount         = $ThreadCount
    }

    # Discover any domains trusted by the domain of the computer running the script
    Write-LogMsg @Log -Text '$TrustedDomains = Get-TrustedDomain' -Expand $LogThis
    $TrustedDomains = Get-TrustedDomain @LogThis

    # Initialize the parent progress bar ID to pass to various functions for progress bar nesting
    $LogThis['ProgressParentId'] = 0

}

process {

    #----------------[ Main Execution ]---------------
    $ProgressUpdate = @{
        CurrentOperation = 'Resolve target paths to network paths such as UNC paths (including all DFS folder targets)'
        PercentComplete  = 5
        Status           = '5% (step 2 of 20) Resolve-PermissionTarget'
    }
    Write-Progress @Progress @ProgressUpdate
    $CommandParameters = @{
        CimCache   = $CimCache
        Output     = $Parents
        TargetPath = $TargetPath
    }
    Write-LogMsg @Log -Text 'Resolve-PermissionTarget' -Expand $CommandParameters, $LogThis -ExpandKeyMap @{ Output = '$Parents' }
    Resolve-PermissionTarget @CommandParameters @LogThis

}

end {

    $ProgressUpdate = @{
        CurrentOperation = 'Expand parent paths into the paths of their children'
        PercentComplete  = 10
        Status           = '10% (step 3 of 20) Expand-PermissionTarget'
    }
    Write-Progress @Progress @ProgressUpdate
    $CommandParameters = @{
        RecurseDepth = $RecurseDepth
        TargetPath   = $Parents
    }
    Write-LogMsg @Log -Text '$Items = Expand-PermissionTarget' -Expand $CommandParameters, $LogThis, $Threads -ExpandKeyMap @{ TargetPath = '$Parents' }
    $Items = Expand-PermissionTarget @CommandParameters @LogThis @Threads

    $ProgressUpdate = @{
        CurrentOperation = 'Get the ACL of each path'
        PercentComplete  = 15
        Status           = '15% (step 4 of 20) Get-AccessControlList'
    }
    Write-Progress @Progress @ProgressUpdate
    $CommandParameters = @{
        ErrorAction = 'Stop'
        Output      = $AclByPath
        TargetPath  = $Items
    }
    Write-LogMsg @Log -Text 'Get-AccessControlList' -Expand @{ Output = '$AclByPath'; TargetPath = '$Items' }, $LogThis, $Threads
    Get-AccessControlList @CommandParameters @LogThis @Threads

    $ProgressUpdate = @{
        CurrentOperation = 'Get the FQDN of this computer, each trusted domain, and each server in the paths'
        PercentComplete  = 20
        Status           = '20% (step 5 of 20) Find-ServerFqdn'
    }
    Write-Progress @Progress @ProgressUpdate
    $CommandParameters = @{
        Known      = $TrustedDomains.DomainFqdn
        TargetPath = $Items
        ThisFqdn   = $ThisFqdn
    }
    Write-LogMsg @Log -Text '$ServerFqdns = Find-ServerFqdn' -Expand $CommandParameters, $LogThis -ExpandKeyMap @{ TargetPath = '$Items' }
    $ServerFqdns = Find-ServerFqdn @CommandParameters @LogThis

    $ProgressUpdate = @{
        CurrentOperation = 'Query each FQDN to pre-populate caches, avoiding redundant ADSI and CIM queries'
        PercentComplete  = 25
        Status           = '25% (step 6 of 20) Initialize-Cache'
    }
    Write-Progress @Progress @ProgressUpdate
    $CommandParameters = @{
        CimCache = $CimCache
        Fqdn     = $ServerFqdns
    }
    Write-LogMsg @Log -Text 'Initialize-Cache' -Expand $CommandParameters, $LogThis, $CacheParams
    Initialize-Cache @CommandParameters @LogThis @CacheParams

    # The resolved name will include the domain name (or local computer name for local accounts)
    $ProgressUpdate = @{
        CurrentOperation = 'Resolve each identity reference to its SID and NTAccount name'
        PercentComplete  = 30
        Status           = '30% (step 7 of 20) Resolve-AccessControlList'
    }
    Write-Progress @Progress @ProgressUpdate
    $CommandParameters = @{
        ACLsByPath              = $AclByPath
        ACEsByGUID              = $AceByGUID
        AceGUIDsByPath          = $AceGuidByPath
        AceGUIDsByResolvedID    = $AceGuidByID
        CimCache                = $CimCache
        InheritanceFlagResolved = $InheritanceFlagResolved
    }
    Write-LogMsg @Log -Text 'Resolve-AccessControlList' -Expand $CommandParameters, $LogThis, $CacheParams
    Resolve-AccessControlList @CommandParameters @LogThis @CacheParams

    $ProgressUpdate = @{
        CurrentOperation = 'Get the current domain'
        PercentComplete  = 35
        Status           = '35% (step 8 of 20) Get-CurrentDomain'
    }
    Write-Progress @Progress @ProgressUpdate
    Write-LogMsg @Log -Text '$CurrentDomain = Get-CurrentDomain'
    $CurrentDomain = Get-CurrentDomain

    $ProgressUpdate = @{
        CurrentOperation = 'Use ADSI to get details about each resolved identity reference'
        PercentComplete  = 40
        Status           = '40% (step 9 of 20) Get-PermissionPrincipal'
    }
    Write-Progress @Progress @ProgressUpdate
    $CommandParameters = @{
        ACEsByResolvedID = $AceGuidByID
        CimCache         = $CimCache
        CurrentDomain    = $CurrentDomain
        NoGroupMembers   = $NoMembers
        PrincipalByID    = $PrincipalByID
    }
    Write-LogMsg @Log -Text "Get-PermissionPrincipal" -Expand $CommandParameters, $LogThis, $CacheParams
    Get-PermissionPrincipal @CommandParameters @LogThis @CacheParams

    $ProgressUpdate = @{
        CurrentOperation = 'Join access rules with their associated accounts'
        PercentComplete  = 45
        Status           = '45% (step 10 of 20) Expand-Permission'
    }
    Write-Progress @Progress @ProgressUpdate
    $CommandParameters = @{
        AceGuidByPath          = $AceGuidByPath
        AceGUIDsByResolvedID   = $AceGuidByID
        ACEsByGUID             = $AceByGUID
        ACLsByPath             = $AclByPath
        Children               = $Items
        GroupBy                = $GroupBy
        PrincipalsByResolvedID = $PrincipalByID
        SplitBy                = $SplitBy
        TargetPath             = $Parents
    }
    Write-LogMsg @Log -Text "`$Permissions = Expand-Permission" -Expand $CommandParameters, $LogThis
    $Permissions = Expand-Permission @CommandParameters @LogThis

    $ProgressUpdate = @{
        CurrentOperation = 'Hide domain names and include/exclude accounts as specified'
        PercentComplete  = 50
        Status           = '50% (step 11 of 20) Select-UniqueAccountPermission'
    }
    Write-Progress @Progress @ProgressUpdate
    $CommandParameters = @{
        ExcludeAccount             = $ExcludeAccount
        ExcludeClassFilterContents = $ExcludeClassFilterContents
        ExcludeFilterContents      = $ExcludeAccountFilterContents
        IdByShortName              = $IdByShortName
        IgnoreDomain               = $IgnoreDomain
        IncludeAccount             = $IncludeAccount
        IncludeFilterContents      = $IncludeAccountFilterContents
        PrincipalByID              = $PrincipalByID
        ShortNameByID              = $ShortNameByID
    }
    Write-LogMsg @Log -Text 'Select-PermissionPrincipal' -Expand $CommandParameters, $LogThis
    Select-PermissionPrincipal @CommandParameters @LogThis

    $ProgressUpdate = @{
        CurrentOperation = 'Analyze the permissions against established best practices'
        PercentComplete  = 55
        Status           = '55% (step 12 of 20) Invoke-PermissionAnalyzer'
    }
    Write-Progress @Progress @ProgressUpdate
    $CommandParameters = @{
        AclByPath                = $AclByPath
        AllowDisabledInheritance = $Items
        AccountConvention        = $AccountConvention
        PrincipalByID            = $PrincipalByID
    }
    $BestPracticeEval = Invoke-PermissionAnalyzer @CommandParameters

    $ProgressUpdate = @{
        CurrentOperation = 'Format the permissions'
        PercentComplete  = 60
        Status           = '60 % (step 13 of 20) Format-Permission'
    }
    Write-Progress @Progress @ProgressUpdate
    $CommandParameters = @{
        Analysis                   = $BestPracticeEval
        ExcludeClassFilterContents = $ExcludeClassFilterContents
        FileFormat                 = $FileFormat
        GroupBy                    = $GroupBy
        IgnoreDomain               = $IgnoreDomain
        IncludeFilterContents      = $IncludeAccountFilterContents
        OutputFormat               = $OutputFormat
        Permission                 = $Permissions
        ShortNameByID              = $ShortNameByID
    }
    Write-LogMsg @Log -Text '$FormattedPermissions = Format-Permission' -Expand $CommandParameters
    $FormattedPermissions = Format-Permission @CommandParameters

    $ProgressUpdate = @{
        CurrentOperation = 'Export the report files'
        PercentComplete  = 65
        Status           = '65 % (step 14 of 20) Out-PermissionFile'
    }
    Write-Progress @Progress @ProgressUpdate
    $CommandParameters = @{

        # Objects as they progressed through the data pipeline
        BestPracticeEval = $BestPracticeEval ; TargetPath = $TargetPath ; Parent = $Parents ; AclByPath = $AclByPath ; AceByGUID = $AceByGUID ; PrincipalByID = $PrincipalByID ;
        Permission = $Permissions ; FormattedPermission = $FormattedPermissions ; BestPracticeIssue = $BestPracticeIssues ;

        # Parameters
        Detail = $Detail ; ExcludeAccount = $ExcludeAccount ; ExcludeClass = $ExcludeClass ; FileFormat = $FileFormat ;
        GroupBy = $GroupBy ; IgnoreDomain = $IgnoreDomain ; OutputDir = $OutputDir ; OutputFormat = $OutputFormat ;
        NoMembers = $NoMembers ; RecurseDepth = $RecurseDepth ; SplitBy = $SplitBy ; Title = $Title ;

        # Cached variables in memory
        LogFileList = $TranscriptFile, $LogFile ; LogParams = $Log ; StopWatch = $StopWatch
        ReportInstanceId = $ReportInstanceId ; WhoAmI = $WhoAmI ; ThisFqdn = $ThisFqdn

    }
    Write-LogMsg @Log -Text 'Out-PermissionFile' -Expand $CommandParameters
    $ReportFile = Out-PermissionFile @CommandParameters

    $ProgressUpdate = @{
        CurrentOperation = 'Open the HTML report file (if the -Interactive switch was used)'
        PercentComplete  = 70
        Status           = '70 % (step 15 of 20) Invoke-Item'
    }
    Write-Progress @Progress @ProgressUpdate
    if ($Interactive -and $ReportFile) {
        Write-LogMsg @Log -Text "Invoke-Item -Path '$ReportFile'"
        Invoke-Item -Path $ReportFile
    }

    $ProgressUpdate = @{
        CurrentOperation = 'Send the results to a PRTG Custom XML Push sensor for tracking'
        PercentComplete  = 75
        Status           = '75 % (step 16 of 20) Send-PrtgXmlSensorOutput'
    }
    Write-Progress @Progress @ProgressUpdate
    $CommandParameters = @{
        XmlOutput    = $XMLOutput
        PrtgProbe    = $PrtgProbe
        PrtgProtocol = $PrtgProtocol
        PrtgPort     = $PrtgPort
        PrtgToken    = $PrtgToken
    }
    Write-LogMsg @Log -Text 'Send-PrtgXmlSensorOutput' -Expand $CommandParameters
    Send-PrtgXmlSensorOutput @CommandParameters

    $ProgressUpdate = @{
        CurrentOperation = 'Output the result to the pipeline'
        PercentComplete  = 80
        Status           = '80 % (step 17 of 20) Out-Permission'
    }
    Write-Progress @Progress @ProgressUpdate
    $CommandParameters = @{
        FormattedPermission = $FormattedPermissions
        GroupBy             = $GroupBy
        OutputFormat        = $OutputFormat
    }
    Write-LogMsg @Log -Text 'Out-Permission' -Expand $CommandParameters -ExpandKeyMap @{ FormattedPermission = '$FormattedPermissions' }
    Out-Permission @CommandParameters

    $ProgressUpdate = @{
        CurrentOperation = 'Cleanup CIM sessions'
        PercentComplete  = 85
        Status           = '85 % (step 18 of 20) Remove-CachedCimSession'
    }
    Write-Progress @Progress @ProgressUpdate
    Write-LogMsg @Log -Text 'Remove-CachedCimSession -CimCache $CimCache'
    Remove-CachedCimSession -CimCache $CimCache

    $ProgressUpdate = @{
        CurrentOperation = 'Export the buffered log messages to a CSV file'
        PercentComplete  = 90
        Status           = '95 % (step 19 of 20) Export-LogCsv'
    }
    Write-Progress @Progress @ProgressUpdate
    $CommandParameters = @{
        Buffer  = $LogBuffer
        LogFile = $LogFile
    }
    Write-LogMsg @Log -Text 'Export-LogCsv' -Expand $CommandParameters, $LogThis -ExpandKeyMap @{ Buffer = '$LogBuffer' }
    Export-LogCsv @CommandParameters @LogThis

    Stop-Transcript  *>$null

    # Complete the progress bar
    Write-Progress @Progress -Completed

}