functions/administrativeunit/Remove-PSEntraIDAdministrativeUnit.ps1

function Remove-PSEntraIDAdministrativeUnit {
    <#
    .SYNOPSIS
        Delete administrative unit

    .DESCRIPTION
        Delete administrative unit from Microsoft Entra ID (Azure AD).
        When deleted, administrative unit resources are moved to a temporary container and can be restored within 30 days.
        After that time, they are permanently deleted.

    .PARAMETER InputObject
        PSMicrosoftEntraID.DirectoryManagement.AdministrativeUnit object in tenant/directory.

    .PARAMETER Identity
        DisplayName or Id of the administrative unit attribute populated in tenant/directory.

    .PARAMETER EnableException
        This parameter disables user-friendly warnings and enables the throwing of exceptions. This is less user friendly,
        but allows catching exceptions in calling scripts.

    .PARAMETER WhatIf
        Enables the function to simulate what it will do instead of actually executing.

    .PARAMETER Force
        Suppresses the confirmation prompt, for unattended use.

        An explicitly bound -Confirm wins over it, whatever its value: -Confirm:$true
        prompts even with -Force present. The two are therefore alternatives rather
        than a pair - passing both says nothing the second one does not already say.

        Without either, whether the command prompts is left to its ConfirmImpact and
        the session ConfirmPreference, which is the PowerShell default behaviour.

    .PARAMETER Confirm
        Prompts for confirmation before the command makes a change. -Confirm:$false
        suppresses that prompt.

        Bound explicitly it wins over -Force, whatever its value - so -Confirm:$true
        prompts even alongside -Force, and the two are alternatives rather than a pair.

        Left unbound, the decision belongs to this command's ConfirmImpact and the
        session ConfirmPreference, which is the PowerShell default behaviour.

    .PARAMETER PassThru
        When specified, the cmdlet will not execute the delete action but will instead
        return a `PSMicrosoftEntraID.Batch.Request` object for batch processing.

    .EXAMPLE
        PS C:\> Remove-PSEntraIDAdministrativeUnit -Identity "Marketing AU"

        Delete administrative unit "Marketing AU" from Microsoft Entra ID

    .EXAMPLE
        PS C:\> Get-PSEntraIDAdministrativeUnit -DisplayName "Old Department" | Remove-PSEntraIDAdministrativeUnit

        Delete administrative unit by piping from Get cmdlet

    .NOTES
        Administrative units provide a way to subdivide your organization and delegate administrative permissions
        to those subdivisions. When deleted, they can be restored within 30 days.

    #>


    [OutputType([PSMicrosoftEntraID.Batch.Request])]
    [CmdletBinding(SupportsShouldProcess = $true, ConfirmImpact = 'High', DefaultParameterSetName = 'InputObject')]
    param ([Parameter(Mandatory = $True, ValueFromPipeline = $true, ParameterSetName = 'InputObject')]
        [PSTypeName('PSMicrosoftEntraID.DirectoryManagement.AdministrativeUnit')]
        [object[]] $InputObject,
        [Parameter(Mandatory = $True, ValueFromPipelineByPropertyName = $true, ParameterSetName = 'Identity')]
        [Alias("Id", "AdministrativeUnitId")]
        [ValidateNotNullOrEmpty()]
        [string[]] $Identity,
        [Parameter()]
        [switch] $EnableException,
        [Parameter()]
        [switch] $Force,
        [Parameter()]
        [switch] $PassThru
    )

    begin {
        [string] $service = Get-PSFConfigValue -FullName ('{0}.Settings.DefaultService' -f $script:ModuleName)
        Assert-EntraConnection -Service $service -Cmdlet $PSCmdlet
        [int] $commandRetryCount = Get-PSFConfigValue -FullName ('{0}.Settings.Command.RetryCount' -f $script:ModuleName)
        [System.TimeSpan] $commandRetryWait = New-TimeSpan -Seconds (Get-PSFConfigValue -FullName ('{0}.Settings.Command.RetryWaitInSeconds' -f $script:ModuleName))
        [hashtable] $header = @{
            'Content-Type' = 'application/json'
        }
        [hashtable] $cmdLetConfirm = Resolve-PSEntraIDConfirmPreference -BoundParameters $PSBoundParameters -Force:$Force -Confirm:$Confirm
    }

    process {
        switch ($PSCmdlet.ParameterSetName) {
            'InputObject' {
                foreach ($itemInputObject in $InputObject) {
                    [string] $path = ("directory/administrativeUnits/{0}" -f $itemInputObject.Id)

                    if ($PassThru.IsPresent) {
                        [PSMicrosoftEntraID.Batch.Request]@{
                            Method  = 'DELETE'
                            Url     = ('/{0}' -f $path)
                            Headers = $header
                        }
                    }
                    else {
                        Invoke-PSFProtectedCommand -ActionString 'AdministrativeUnit.Remove' -ActionStringValues $itemInputObject.DisplayName -Target (Get-PSFLocalizedString -Module $script:ModuleName -Name Identity.Platform) -ScriptBlock {
                            [void] (Invoke-EntraRequest -Service $service -Path $path -Header $header -Method Delete -ErrorAction Stop)
                        } -EnableException:$EnableException @cmdLetConfirm -PSCmdlet $PSCmdlet -Continue -RetryCount $commandRetryCount -RetryWait $commandRetryWait
                        if (Test-PSFFunctionInterrupt) { return }
                    }
                }
            }
            'Identity' {
                foreach ($administrativeUnit in $Identity) {
                    [PSMicrosoftEntraID.DirectoryManagement.AdministrativeUnit] $aADAdministrativeUnit = Get-PSEntraIDAdministrativeUnit -Identity $administrativeUnit
                    if ([object]::Equals($aADAdministrativeUnit, $null)) {
                        if ($EnableException.IsPresent) {
                            Invoke-TerminatingException -Cmdlet $PSCmdlet -Message ((Get-PSFLocalizedString -Module $script:ModuleName -Name AdministrativeUnit.Remove.Failed) -f $administrativeUnit)
                        }
                    }
                    else {
                        [string] $path = ("directory/administrativeUnits/{0}" -f $aADAdministrativeUnit.Id)

                        if ($PassThru.IsPresent) {
                            [PSMicrosoftEntraID.Batch.Request]@{
                                Method  = 'DELETE'
                                Url     = ('/{0}' -f $path)
                                Headers = $header
                            }
                        }
                        else {
                            Invoke-PSFProtectedCommand -ActionString 'AdministrativeUnit.Remove' -ActionStringValues $aADAdministrativeUnit.DisplayName -Target (Get-PSFLocalizedString -Module $script:ModuleName -Name Identity.Platform) -ScriptBlock {
                                [void] (Invoke-EntraRequest -Service $service -Path $path -Header $header -Method Delete -ErrorAction Stop)
                            } -EnableException:$EnableException @cmdLetConfirm -PSCmdlet $PSCmdlet -Continue -RetryCount $commandRetryCount -RetryWait $commandRetryWait
                            if (Test-PSFFunctionInterrupt) { return }
                        }
                    }
                }
            }
        }
    }

    end {}
}