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Remote Desktop Protocol (RDP) essentially helps us connect two systems to a remote location. We have already seen how to enable and disable the remote desktop connection using the RDP protocol. However, when you connect to Windows 8.1, 8, 7 or Vista operating systems using a Remote Desktop, license errors can sometimes occur. In general, you will probably receive a subsequent error in such cases:
The remote session has been disconnected because no Remote Desktop client access license is available for this computer. Please contact the server administrator.
The cause of this problem is that the Terminal Server (TS) is not able to find the license server. Therefore, you have received the message and you cannot bridge one Remote Desktop connection.
If you have this problem on Windows Server, it is best to check if the license server is installed correctly and the Terminal Server Licensing Service works perfectly on it. If this does not help, you must follow these steps:
Errors when editing the Windows registry can have a negative effect on your system. So be careful when editing registry entries and create a system restore point before continuing.
1 Press the Windows key + R combination, enter put in the Run dialog box and press Enter to open the editor Registry Editor.
2 Navigate to the left pane of Registry Editor here :
3 In the window above, right-click the MSLicensing button and select Export. This allows you to save this registry key as a backup as a registry file. Right-click the same registry key and select Delete.
Confirm deletion of the registration key by clicking Yes here:
After deletion, close the registry editor and restart the system. The next time the client Remote Desktop Client is started, the deleted registry key is recreated, which solves the problem.
Hope this helps!