Configure License Settings on a Terminal Server
Applies To: Windows Server 2008
Each user or computing device that connects to a terminal server must have a valid Terminal Services client access license (TS CAL) issued by a Terminal Services license server.
After you have installed and configured the license server, you need to configure your terminal server by doing the following:
Specify the Terminal Services Licensing Mode on a Terminal Server
Specify the License Server Discovery Mode on a Terminal Server