A company is deploying Windows Server 2008 R2 Remote Desktop services (RDS). Another
administrator has installed RDS client access licenses (CALs) on the Remote Desktop
license server. You need to ensure that the Remote Desktop Session Host (RD Session
Host) server requests licenses from the Remote Desktop license server.
What should you do first?

A.
Configure Remote Desktop licensing mode on the RD Session Host.

B.
Create an RDS farm and add the RD Session Host to the farm.

C.
Activate the Remote Desktop license server.

D.
Install the RD Licensing role service.

Explanation:
“Another administrator has installed RDS client access licenses (CALs) on the Remote
Desktop license server”
http://technet.microsoft.com/en-us/library/cc754487.aspx
http://technet.microsoft.com/en-us/library/dd883253%28v=ws.10%29.aspx