When a client computer connects to an RDS Session Host, the host determines if the client has a valid RDS CAL. For licensing models, the Remote Desktop Licensing server issues a digital token (the CAL) to the client machine.
Follow these steps to reset the grace period:
Right-click the name of the license server and select Microsoft Learn .
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server\RCM\LicensingCore\IssuedLicenses rds cal license registry key
The RDS CAL registry key is a powerful but risky diagnostic tool. Only modify LicensingMode and LicenseServers when group policy cannot be applied. Never touch the IssuedLicenses subtree without Microsoft Support involvement.
Last updated: 2025
The next time the client connects to the RDS server, it will request and receive a new license token. When a client computer connects to an RDS
The settings that define how the RD Session Host discovers and connects to the RD Licensing Server are also written to the registry.
Inside this key, you will see a binary value (usually starting with L$ ) that counts down the grace period duration. Resetting the Grace Period (Testing & Development Only)
Restart the physical or virtual server to apply the changes and restart the 120-day clock. Last updated: 2025 The next time the client
What is your RDS environment running? Are you using Per User or Per Device CALs?
The Remote Desktop Services (RDS) Client Access License (CAL) Registry Key: A Complete Guide
Subkeys like HardwareID and Store containing the actual certificates.