Source

Level

Description

One or more Terminal Services Licensing certificates on server SERVER are corrupt. Terminal Services Licensing will only issue temporary licenses until the server is reactivated. See Terminal Services Licensing help topic for more information.

Comments

 

This issue occurs because a certificate that is part of the digital certificate chain expires. See ME983385 for information about an avaiilable hotfix.

See ME887443 for information on fixing this problem.

See ME306578 for information on how to deactivate or reactivate a License Server using Terminal Services Licensing.

We got this error when we re-booted the server. A second re-boot did not generate the same error. From that point on any request from a client for a license generated an Event ID 30 (same source) that read: "Can’t generate a license for client because of error: Can’t add certificate to store, error c0010020".
In Terminal Services Licensing, the server status was "Unknown". Any attempt to activate or even bring up Properties resulted in an error about being unable to communicate with the Licensing Server.
Called MS tech support and ended up uninstalling & installing TS Licensing, activating the server and installing the license packs. Everything worked fine after that.