I have a 2012 Server that is not on a domain, it is in a workgroup. I have a computer on the same LAN/SUBNET and I cannot log into it remotely. I get the following error:
To sign in remotely, you need the right to sign in through Remote Desktop Services. By default, members of the Remote Desktop Users group have this right. If the group you're in doesn't have this right, or if the right has been removed from the Remote Desktop Users group, you need to be granted this right manually.
Remote Services is enabled on this server.