You can find this key at the following path:
The standard industry fix for licensing protocol errors involves "rebuilding" the key on the client machine. This forces the client to negotiate a fresh license with the server upon the next connection. 1. Back Up the Registry Key mslicensing registry key
For most users, the Registry is a daunting place—a digital basement full of cryptic codes. However, the mslicensing key plays a specific and vital role in how Windows manages Terminal Server (Remote Desktop) licensing. You can find this key at the following
Under normal circumstances, you should never have to touch this key. Windows handles the licensing handshake automatically. However, there are specific error scenarios where editing or resetting this key becomes a necessary troubleshooting step. mslicensing registry key