Windows Server Remote Desktop Services grace period expoired

Remove the RDS licensing time-bomb registry entry with the help of Sysinternals PSExec (Regedit alone couldn’t do it because it had to be run under highest privileges):

psexec -s -i regedit.exe:

Locate the registry key: HKLM\system\CurrentControlSet\Control\Terminal Server\RCM\GracePeriod

 

Remove the registry key GracePeriod and reboot the computer.

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