Here is a link to an excellent series of blog posts on how to set up and configure Remote Desktop Services (Terminal Services) in a clear and easy manner.
- http://msfreaks.wordpress.com/2013/12/09/windows-2012-r2-remote-desktop-services-part-1/
- http://msfreaks.wordpress.com/2013/12/23/windows-2012-r2-remote-desktop-services-part-2/
- http://msfreaks.wordpress.com/2013/12/26/windows-2012-r2-remote-desktop-services-part-3/
- http://msfreaks.wordpress.com/2014/01/08/step-by-step-windows-2012-r2-remote-desktop-services-part-4/