It's possible to force the users in a Windows domain to only have one active log in in the same time? How to do it?
2 Answers
In addition to jliendos link
3rd party userlock software that works with windows 2008
http://www.isdecisions.com/en/software/userlock
More info on limitlogin
http://davidhazar.blogspot.com/2010/09/microsoft-limit-login-and-login-scripts.html