Mslicensing Registry Key Jun 2026

The is a critical component of Microsoft’s Remote Desktop Services (RDS) architecture. Located on client machines, this key stores the Client Access Licenses (CALs) that allow a device to connect to a Remote Desktop Session Host. When this key becomes corrupted or fails to update, users typically encounter the error: "The remote computer disconnected the session because of an error in the licensing protocol."

This is a common point of confusion. The mslicensing key exists on the machine (the computer initiating the Remote Desktop connection). It stores the client license. If you are having licensing issues on the server side, you would look at the Remote Desktop Licensing Manager tool, not this specific registry key. mslicensing registry key

Once you have permissions: