Finding WSUS Clients by SusClientId | BackSlasher

param(
    [uri]$wsusUri = 'https://WSUS-Server:443',
    $ComputerName = 'OtherServer'
)
$wsus = Get-WsusServer $wsusUri.Host -PortNumber $wsusUri.Port -UseSsl:($wsusUri.Scheme -eq 'https')
$baseKey = [Microsoft.Win32.RegistryKey]::OpenRemoteBaseKey('LocalMachine',$ComputerName);
$key = $baseKey.OpenSubKey('SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate');
$id = $key.GetValue('SusClientId')
$wsus.GetComputerTarget($id).FullDomainName