How to change RDP Port in Windows Server

1) Start Registry Editor by typing regedit at command prompt.

2) Locate and then click the following registry subkey:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\TerminalServer\WinStations\RDP-Tcp\PortNumber

3) On the Edit menu, click Modify, and then click Decimal.

4) Type the new port number, and then click OK.

5) Quit Registry Editor.

6) Restart the computer.