When running an RDS environment you sometimes find it easier to see what the user is actually seeing in his session. This is done by setting up remote control of RDS sessions.
You can monitor the actions of a client logged on to an RD Session Host server by using remote control from another session. Remote control allows you to either observe or actively control a client session. If you choose to actively control a client session, you will be able to input keyboard and mouse actions to the session. You can warn a client that you want to remotely control their session by choosing to display a message on the client that asks permission to view or take part in the session
To do this for Windows Server 2008 R2, just follow the Microsoft guide on this link: http://technet.microsoft.com/en-us/library/cc771538.aspx