Identify and disconnect / log off remote RDP sessions

Run QWINSTA to extract the RDP session information

• QWINSTA /SERVER:servername

If the session exists, read the username and session ID.

• To disconnect user 

    TSDISCON /SERVER:servername sessionID

• To log-off user / kill the session

    RWINSTA /SERVER:servername sessionID


Ref : http://discoposse.com/2012/10/20/finding-rdp-sessions-on-servers-using-powershell/