This Terminal Services license server is too busy to notify other Terminal Services license servers about the number of Terminal ...

This Terminal Services license server is too busy to notify other Terminal Services license servers about the number of Terminal Services client access licenses (TS CALs) that it has in its database. It will attempt to notify other Terminal Services license servers later. If the problem persists, free up available memory if memory is low on the Terminal Services license server, and identify and resolve any issues with network connectivity, specifically with firewall configuration. Problems with remote procedure calls (RPCs) might also cause this issue.