How to boot other Remote Desktop users

You can use Terminal Services Manager under Administrative Tools.

If you prefer a command-line solution, you can use this to list RDP sessions:

query session /server:servername

To reset a session, look for the relevant session ID in the "ID" column of the output from the above command, then use:

reset session <sessionid> /server:servername

Also keep in mind that even though the remote server is not letting you RDP in normally, you can still hijack the console remotely:

To RDP to the Console of your remote server: from your client PC, open the CMD prompt and type: MSTSC /ADMIN (or if you are using an older RDP client, use MSTSC /CONSOLE)

This will allow you to remote logon to the console (and if necessary boot off anyone currently logged onto the console) - then you can use the Terminal Services Manager or Reset Session commands to boot off other RDP users...

What you want is Terminal Services Manager