.net used for magic
well there's an easy solution if need something urgently and u need to kick someone (close his session)
mstsc -v:[UrServerNameOrIP] /console
You've been kicked (a good thing) - Trackback from DotNetKicks.com
I guess you need to be an admin on the server to do so
another way to do it (not from the cmd) is from another machine; control panel-> Administrative tools -> Terminal Services Manager
then connect to the server name, hence you can see the sessions users & if they r diconnected or active and u can kick somebody off