Windows server 2012 R2 Foundation

Options
Hello

We intend to test Teamviewer to remotely access a Windows 2012 R2 Foundation domain server. At this moment I installed the free version on the server.
When I try to communicate with the server, the system informs that the partner does not have
internet or that his teamviewer is not running.
But if I'm logged into the server, I communicate.

We want to be able to communicate without sessions logged into the server and that 
when trying to communicate it is possible to choose a user to log in to the server

Thanks