Win 2012 R2 - add more than 2 RDP - server standalone (not in a domain)

HI,

I need to be able to have more than 2 RDP concurrent sessions on a Windows 2012 R2 standalone, that means not in a domain.

I understand that would be possible through RD licencing if the server was in a domain, but that is not my case.

What role/feature should I get?

Thanks for you help 

---

BD