When I attempted to log in remotely to a Windows 10 system that is a member of a Server 2012 Windows domain using a domain account, I saw the message "The connection was denied because the user account is not authorized for remote login."
To resolve the problem, I logged into the system remotely from the domain administrator account, since that account was granted remote logon privilege by default. I was then able to take the following steps on the Windows 10 system to grant remote logon access to the system for other domain accounts.
You should now be able to log into the system remotely with the
accounts you added to the Remote Desktop Users group by running
mstsc /v system_name
at a command prompt or by using
the Remote Desktop Connection
GUI application.
Created: Monday January 4, 2016