If RDP/Terminal services is down it is impossible to access the server using a GUI. Telnet is insecure and is disabled by default - as it should be - and there is no native command-line remote-access facility natively installed. There are many SSH servers for Windows available, however these can only be installed if the server can be sucessfully remotely managed of course. A tool from Sysinternals called psexec can be used to run cmd remotely, effectively giving telnet access to the server.

  1. Download psexec
  2. Run the following command: psexec \\\\hostname -u username cmd

See Also

Performing functions via the command line