Microsoft RDP licensing protocol error

When you connect to a remote workstation, you receive one of the errors below.

Solution 1

1. Close Remote Desktop Manager.
2. Navigate to %localappdata%\Devolutions.
3. Move the RemoteDesktopManager folder to your desktop.
4. Restart Remote Desktop Manager.

Solution 2

In File – Settings – Types – RDP change the RDP engine to RDP (FreeRDP Latest).

Solution 3

Try to check/uncheck the NLA option located under the Connection tab in the Properties of the session.

Solution 4

In some cases, and sometimes depending on the host OS, the CredSSP setting may interfere. Change its value in Session properties – General – Advanced Tab.

Solution 5

Try to check/uncheck the Open Console option and see if the error message disappear or is still the same in the General settings of the Properties.