Do you ever have the problem that you take over a Windows Server with a remote desktop, you then later close the session leaving all your programs open to run for example overnight. The next time you start your remote desktop session you will enter a new session besides the one you already have running. If so, with the tscon command you can switch sessions.

First identify the session id of the session you want to control, you can do this by opening Terminal Services Manager. When you have your ID (i.e. 1) start a command prompt and enter: tscon {id} /v (i.e: tscon 1 /v) inside your current session.
You’re current session will be stopped and you will be redirected to session nr. 1