Microsoft RDP licensing protocol error

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

!!KB4234 !!KB4235

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.

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