While the licensing mode should ideally be configured via Group Policy Objects (GPO) or Server Manager, administrators can force the mode directly via the registry if deployment tools fail.
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server\RCM\Licensing Core
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server\RCM\Licensing Core
Understanding RDS CAL Registry Keys: Management, Troubleshooting, and Licensing
Q: Can I get RDS CAL licenses for free? A: In some cases, such as free trials or evaluation versions, but these licenses are limited and not intended for production use. rds cal license registry key free
This technical guide analyzes how the Windows Registry interacts with RDS CAL tracking, the mechanisms behind the grace period, and the operational realities of managing these licensing parameters. Understanding the RDS Licensing Grace Period
RDS CAL License Registry Key Free: Resetting the 120-Day Grace Period (Educational Guide)
Press Win + R , type regedit , and hit Enter.
The remaining time for this grace period is tracked within an encrypted binary registry key located at: HKLM\SYSTEM\CurrentControlSet\Control\Terminal Server\RCM\GracePeriod The Reality of "Grace Period Resets" While the licensing mode should ideally be configured
Change the owner to the local Administrators group.
This article is for educational purposes only, aimed at administrators managing test environments. Using this method to avoid purchasing licenses in a production environment violates Microsoft's licensing terms. What is the RDS CAL Grace Period?
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server\RCM\GracePeriod
The technical mechanism behind the commonly discussed registry workaround involves the following steps: This technical guide analyzes how the Windows Registry
The primary registry path responsible for monitoring the evaluation state is: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server\RCM\GracePeriod Key Operational Characteristics:
For the changes to take effect, the licensing stack must reinitialize: Open the Windows Services console ( services.msc ). Locate the service.
The core configuration for the RD Licensing service is located at: HKLM\SYSTEM\CurrentControlSet\Services\TermServLicensing\Parameters
Remote Desktop Services (RDS) Client Access Licenses (CALs) are required for users or devices to access Windows Server terminal services. When setting up a new RDS environment, Microsoft provides a generous . During this time, the server operates without installed CALs.
Attempting to use this registry reset process as a long‑term solution in a production environment is fraught with peril for several critical reasons:
Open the , right-click your server, and select Activate Server .