I have a Windows sever which we just recently added 7 per-user licenses to. It was working for serving full RDP desktop sessions and RemoteApps prior to adding the licences.
After adding the licenses, full RDP desktop sessions work fine.
However, RemoteApps cause this to show up in the logs:
1069: The RD Licensing grace period has expired and Licensing mode for the Remote Desktop Session Host has not been configured. Licensing mode must be configured for continuous operation.
How come full RDP desktops work, but RemoteApps don't?
If I open this control panel:
Remote Desktop Services > Remote Desktop Session Host Server
It is set to:
Remote Desktop licensing mode: Per User
Remote Desktop license servers: Specified
And the "Licensing Diagnosis" reports:
Licensing Diagnosis did not identify any licensing problems for the Remote Desktop Session Host server.