To enable remote desktop on Windows Server 2012 is really simple from the server manager go to local server and here click on the disabled link inside remote desktop, now here check-mark allow remote connection to this computer, the second option is up to you, you add users by clicking select users button. by default the administrator already has access.
To add a user just click on add if you know the name of the user just type it in check names and will auto correct username, if you don’t know just click on advanced fine now and then find the user you wish to grant remote access to the Windows server 2012.
