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Check "Replace owner on subcontainers and objects" and click OK.
Navigate to HKLM\SYSTEM\CurrentControlSet\Control\Terminal Server\RCM\GracePeriod . Right-click the GracePeriod key and select . Change the owner to Administrators and grant Full Control . Delete the binary value (often named L$RTCS or similar). Reboot the server. 2. Backing up and Exporting RDS CAL Registry Structures
Inside the GracePeriod folder, look for a binary value entry (it usually has a long alphanumeric name like L$Certificates... ). Right-click that specific binary entry and select . Confirm the deletion. Step 4: Restart the Server
For 64-bit systems, the path remains largely the same, but the key may be located under the WOW64 node for compatibility. rds cal license registry key free
On individual client machines running Windows, cached hardware ID info and temporary Per Device CALs are stored locally to speed up subsequent connections. This data is located at: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSLicensing
After a reboot, the grace period restarts — but this is , and Microsoft does not support it for production.
While the is a powerful tool for troubleshooting and resetting grace periods, there is no such thing as a "free" permanent license hidden in the registry. To ensure your server remains secure and compliant, always use the Remote Desktop Licensing Manager to install legitimate keys purchased through official channels. Check "Replace owner on subcontainers and objects" and
Press Win + R , type regedit , and press Enter .
If you already own CALs but the server is stuck in "Grace Period," you can edit the registry to reset broken configurations. This requires administrative rights.
If your 120-day evaluation period has expired in a test environment, you can reset it back to day one by deleting the time-bomb registry entry. This forces the operating system to regenerate a new 120-day window upon reboot. Step 1: Back Up Your Registry Before making any changes, export your current settings. Press Win + R , type regedit , and hit . File path navigate to the RCM folder. Change the owner to Administrators and grant Full Control
Q: What are the risks of using a pirated RDS CAL license registry key? A: Security risks, compliance risks, and support and maintenance risks.
The technical mechanism behind the commonly discussed registry workaround involves the following steps:
Deleting the contents of the MSLicensing key on a client machine is a common troubleshooting step when a specific computer receives a "Remote session disconnected because there are no Remote Desktop License Servers available" error. Windows automatically rebuilds this key the next time the Remote Desktop Connection client is run as an administrator. Authorized Methods for Managing RDS CALs
You can reset the grace period using this command (for lab testing only):