Remote Desktop Licensing mode is not configured in Windows Server2012
Solution 1:
If you're only using RDP to manage the server then you don't need any of the RDS roles or services. Remote Desktop (for managing the server) uses the RDP protocol just like RDS does, but it's not neccessary to add the RDS roles. the RDP protocol is built in to the OS and remote management via RDP is enabled in the Local Server settings in Server Manager.