Today no Remote desktop users can login. Console sessions are working fine though, licensing is okay, no errors.
But users trying to login are logged in the security log such:
Eventid: 4625 – An account failed to log on.
The update KB3002657 in Windows 2003 ADC was the cause. Uninstall update KB3002657 from the domain controllers or modifiy the GPO in rds server.
– Administrative Templates
– Windows Components
– Remote Desktop Services
– Remote Desktop Session Host
Require use of specific security layer -> Enable -> Rdp
Otherwise you can try to install KB 3002657-v2.