Windows Server 2012: The remote session was disconnected because there are no Terminal Server client access licenses available for this computer

If you try a RDP connection you get the following Error message.
 

It could be the case, that no license is available:
So you have to add the needed license to you RD Licensing Server!

If this server isn´t a terminal server you have to run the RDP console with the following parameter:
mstsc /admin

OR->

You can also disable "User Account Control: Run all administrators in Admin Approval Mode" by doing the following steps:

- Open "Search" and type in "secpol" and click on "Local Security Policy"
 

- In the "Local Security Policy" browse to "Local Policies/Security" options and set "User Account Control: Run all administrators in Admin Approval Mode" to "Disabled".



After this change restart the server.