Rds Cal License Registry Key =link= Official

Navigate to: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSLicensing

If a receives a "licensing protocol" error, deleting the local license cache often forces a fresh request. Guidance for troubleshooting RDS Licensing - Windows Server

After making registry changes, use the tool to confirm the server status.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\TermServLicensing\Parameters 2. Common Administrative Use Cases for the Registry Keys rds cal license registry key

Organizations may encounter issues with RDS CAL license registry keys, including:

This error can occur when attempting to install RDS CALs, particularly with Open Value agreements. If the registry key appears empty, converting the license to a Retail License (via Microsoft Volume Licensing support) often resolves the issue.

# List installed license packs Get-WmiObject -Class Win32_TSIssuedLicense -Namespace root\cimv2\terminalservices Common Administrative Use Cases for the Registry Keys

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server\RCM\Licensing Core

These commands will return the number of days remaining before licensing enforcement begins.

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To help troubleshoot your specific deployment, could you share your RDS host runs, whether you are using Per User or Per Device CALs, and the exact error message your users see? Share public link

The server hosting the Remote Desktop Licensing role stores database parameters, discovery settings, and activation statuses in the registry.

Additionally, ensure that the license server itself is correctly activated and has CALs installed via the RD Licensing Manager. Without these prerequisites, registry changes alone won't resolve licensing failures.

This is the most critical registry path for RDS licensing configuration. Within this key, you'll find the LicensingMode value, which determines how your Remote Desktop Session Host (RDSH) server issues client access licenses (CALs). This setting must align with the type of CALs installed on your license server—whether Per User or Per Device. The registry setting can also be configured via Group Policy (Computer Configuration > Administrative Templates > Windows Components > Remote Desktop Services > Remote Desktop Session Host > Licensing), but direct registry editing is often necessary for troubleshooting.