Terminal Services in Windows Server 2008 R2 becomes Remote Desktop Services (source). This is a bit confusing especially if you want to setup multiple concurrent remote desktop connections.
In order to allow this on Windows 2008 R2 perform the following steps:
- Start -> Administrator Tools -> Remote Desktop Services -> Remote Desktop Services Host Configuration
- Double click the “Remote Desktop Licensing Mode” under the “Licensing” Title
- Uncheck the default behaviour of “Restric each user to a single session”.
Now you can connect with 2 clients to the same machine without loosing your session.