A fully functional and activated 2012 R2 Remote Desktop Session Host server displayed the following message:
This was a simple setup on one server with the: connection broker, Session Host and Licensing server with 2012 R2 CALâ€™s installed.
Even though the licensing seems to be configured correctly, in server manager:
everywhere you look, everything seems to be OK. But the license manager shows something odd:
No licenses are being used? This server was used since late 2012. Some interesting things could also be found in the event logs, the following events appear:
The Remote Desktop Session Host server does not have a Remote Desktop license server specified. To specify a license server for the Remote Desktop Session Host server, use the Remote Desktop Session Host Configuration tool.
The RD Licensing grace period has expired and the service has not registered with a license server with installed licenses. A RD Licensing server is required for continuous operation. A Remote Desktop Session Host server can operate without a license server for 120 days after initial start up.
The solution was to delete the REG_BINARY inHKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server\RCM\GracePeriod
Only leaving the default.
Note: you must take ownership and give admin users full control to be able to delete this key.
After a reboot the server should be working again, licenses are now being used:
Although everything seemed to be OK and configured correctly with valid licenses, it seems that the setup was still in a 180 day grace period, even though it was correctly configured.