I have recently installed a Server 2012r2 as follows:
Bare Metal: 2012r2 with Hyper-V Server.
On that we have two VMs both running Server 2012r2, one is configured with the Server Essentials role and DHCP the other is purely for Exchange 2013. I understand that the deal with this configuration is that you are allowed to run the two VMs to count as your 2 licences under Server 2012r2 Standard licence, as long as you don't install any other roles onto the bare metal install.
As I administer this machine remotely I would like to be able to log into the bare metal box using Remote Desktop and also I would like to run the NT Backup program on it as well to back up the Virtual Machines on a daily basis. The question is if I add the Remote desktop and backup roles to this box does this invalidate the licence and will it stop the two VMs running due to a licencing issue?