Since yesterday all users have lost the ability to RDP onto our Server 2008 machine, we are getting the error "The login attempt failed" when using the correct domain credentials as before. We have tried using local credentials to RDP and that also did not authenticate.
Other points.
- Server is listening for Port 3389
- Connections are allowed from Remote settings
- Users are added to the remote users group
- Terminal services are up and running
We're not sure what could of possibly happened to cause RDP to suddenly stop authenticating?
Any insight would be much appreciated.
Chris