What Windows licenses are required to run additional terminal service sessions

Posted by John P on Server Fault See other posts from Server Fault or by John P
Published on 2011-03-09T15:35:38Z Indexed on 2011/03/09 16:12 UTC
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terminal-server-licensing

We need to build out a server running Windows 2008 R2 Standard that can allow up to 10 simultaneous RDP/Terminal Services connections and I'm a little confused about how the CAL licenses work. From one source I was told I needed 10 "server CALs" and an additional 10 "RDP CALs" (total of 20 CALs). From another, I was told I just needed the 10 "RDP CALs", which implicitly came with the server CAL. The Microsoft licensing website (http://www.microsoft.com/windowsserver2008/en/us/licensing-rds.aspx) seems to support scenario #1, but it is still not real clear what those server CALs are needed for. Also, can we use the 2 "built-in" RDP clients, meaning we only need to purchase 8 CALs to reach a total of 10?

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