Reset PVD for a Desktop Group via PowerShell and WMI

$NameSpace = "ROOT\citrix"
$ClassName = "Citrix_PvDPool"

# Change this value to the name of the desktop group you want to reset
$DesktopGroupName = "My PVD Desktop Group"

# Add Citrix PowerShell snap-ins
asnp Citrix*

Write-Host
Write-Host "Preparing to reset the Personal vDisk on all VMs in Desktop Group " -nonewline; Write-Host -foregroundcolor green """$DesktopGroupName"""
Write-Host
Write-Host -foregroundcolor cyan "IMPORTANT" -nonewline; Write-Host " - please ensure all VMs are in a started and registered state!"
Write-Host

#Insert a pause
Write-Host "Press any key to continue..."
$x = $host.UI.RawUI.ReadKey("NoEcho,IncludeKeyDown")

# Work out if all desktops are registered
$PVDDesktopGroup = Get-BrokerDesktopGroup -name $DesktopGroupName
if ($PVDDesktopGroup.DesktopsAvailable -lt $PVDDesktopGroup.TotalDesktops)
{
Write-Host
Write-Host -foregroundcolor cyan "WARNING" -nonewline; Write-Host " - Not all desktops appear to be registered, are you sure you want to continue? If so, press any key..."
$x = $host.UI.RawUI.ReadKey("NoEcho,IncludeKeyDown")
}

$PVDDesktops = Get-Brokermachine -DesktopGroupName $DesktopGroupName

Write-Host
Write-Host "Resetting Personal vDisks for the following machines:"

# Perform the PVD Reset via WMI
foreach ($PVDDesktopsMachine in $PVDDesktops)
{
Write-Host $PVDDesktopsMachine.DNSName
Invoke-WMIMethod -Class $classname -ComputerName $PVDDesktopsMachine.DNSName -Namespace $namespace -Name Reset
}

Write-Host
Write-Host "All done!"
Write-Host