Find RDP Port number specified on a Remote Windows machine via Powershell

# Script to know the RDP port numbers used on remote servers

clear-host
Write-host **************************************************************************
Write-host -foregroundcolor Yellow This script can be used to know the RDP port number specified on a server:
Write-host **************************************************************************
$servername = Read-host    "Enter ServerName to know its RDP port number"
$Reg = [Microsoft.Win32.RegistryKey]::OpenRemoteBaseKey('LocalMachine', $ServerName)
$RegKey= $Reg.OpenSubKey("system\\currentcontrolset\\control\\terminal server\\winstations\\rdp-tcp")
$PortNumber = $RegKey.GetValue("PortNumber")
write-host
write-host ===========================================
Write-Host -ForegroundColor Green RDP Port Number for $servername is $PortNumber
write-host ===========================================

Save above code (in blue) as get-rdpport.ps1 and execute it from Powershell window.
It will prompt for Server name and once supplied it will read the registry value and return RDP port number specified in there.