In the last week one of my clients servers has stopped the Administrator account from logging in from the console, you can however log in from a remote desktop session.
Nothing has changed on the domain other than the addition of a Hyper-V remote desktop server onto the domain, I've checked all the group policy settings and they all allow login from local device.
Spent most of the day today trying to resolve the problem, hopefully an expert can help, the error is :
The sign in method you're trying to use isn't allowed. For more info, contact your network administrator.