When a client (computer) is issued a "Per Device" CAL, a token is stored locally on that client's registry so it can present it during future connections. Microsoft Learn HKEY_LOCAL_MACHINE\Software\Microsoft\MSLicensing Troubleshooting
Before touching the registry, you must understand where Windows stores its RDS licensing information. rds cal license registry key
"Look here," she pointed to the key. "It’s set to 5 . That’s the ghost code. It doesn't know if it wants Per User or Per Device." When a client (computer) is issued a "Per
Once your RDS host obtains a CAL from a license server, it stores the token locally to avoid re-querying the license server for every user connection. This data resides under: especially GracePeriod .
This happens when the RDS service is running. You must stop TermService before certain deletions, especially GracePeriod .