Rds Cal License Registry Key 【2026】

There are several critical registry keys used to manage RDS Client Access Licenses (CALs), depending on whether you are defining the licensing mode, specifying a license server, or managing the grace period. Registry Path Value Name

When you build a new RD Session Host, Microsoft provides a 120-day licensing grace period. During this time, connections are allowed without a licensing server. Once this period expires, users cannot connect unless a licensing server is specified and active.

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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: rds cal license registry key

The primary location for client-side RDS CALs is: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSLicensing Under this path, you will find two critical subkeys:

reg delete "HKLM\SYSTEM\CurrentControlSet\Control\Terminal Server\RCM\GracePeriod" /f

Sometimes, a server fails to issue licenses, or the RDS license grace period expires. Modifying specific registry keys can help resolve these issues, particularly when dealing with "License Server Not Available" errors. There are several critical registry keys used to

By default, even administrators are blocked from deleting items here. You must right-click the GracePeriod folder, select , click Advanced , and change the Owner to the local Administrators group. Grant the Administrators group Full Control permissions.

– Configures the host to use Per-Device licensing mode.

On the RD Session Host side, the operating system tracks how it discovers the licensing server and what mode it operates under. These settings are governed by specific registry keys, which are often mirrored or enforced via Group Policy Objects (GPOs). The TermService Parameters Once this period expires, users cannot connect unless

Stores the actual digital license token issued by the RDS License Server to that specific hardware endpoint. How to Reset the RDS Grace Period via Registry

Moving the license database to a new drive. 2. The RD Session Host Grace Period Key

For mission-critical RDS deployments, configure redundant license servers. You can specify multiple license servers by adding a comma-separated list in the SpecifiedLicenseServers value or via GPO.