This past week, our managed services team at OrcsWeb ran into an issue with Remote Desktop Services 2012. We had a client setup request for RDS on their Windows Server 2012 machine. We were to install the Session Host, Web, and Service Broker roles. This server was to point to our existing 2008 R2 RDS Licensed server. This 2008 R2 server’s only job is to provide central point of management for RDS CALs.
A Windows Server 2012 box cannot point to anything but another Windows Server 2012 box for licensing. This was not an issue, we just stood up a Server 2012 box to replace our 2008 R2 RDS box, where its only role would be a license server.
Once the new server was up and running, RDS licensing role installed, configured and validated with CALs for our server versions, including Server 2012 RDS, we attempted to point our RDS session host installation to the new licensing server.
To do this, I launched Server Manager, selected Remote Deaktop Services from the left panel, in the Role section I selected Overview, then selected the tasks drop down in Deployment Overview and selected Edit Deployment Properties.

I then went to the RD Licensing section to add my license server. I added my licensing server via FQDN, and was promptly greeted with an error message.
“The license server specified is not valid. Verify the server name and specify a valid server name before saving the settings.”

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