The session host must reach the license server over and a range of dynamic ports. Ensure firewalls are not blocking communication between the two roles. Review CAL Installation
You can access the tool via :
Verifies that the host is pointed to the correct license server. rd licensing diagnoser
Tip for IT pros: You can run licensingdiag.exe /silent /log to generate a detailed TXT log for support tickets. The session host must reach the license server
The host is looking for a license server but hasn't been told where to find one. Even if a license server exists on the network, the host must be explicitly pointed to its FQDN or IP address. 3. Version Mismatch rd licensing diagnoser