Licensing Requirements
GE Digital recommends that you install your Remote Desktop Session Host on a computer that is not a domain controller. Ensure that you back up the Remote Desktop Session Host licenses regularly to prevent data loss.
For the most up-to-date Remote Desktop Session Host license information on Windows® Server 2008 R2, visit Microsoft®'s web site:
http://technet.microsoft.com/en-us/library/dd647502(WS.10).aspx