Hello,
after joining a client to the server, I found that - when inactive - the client's screen locks every 10 seconds (yes, seconds). Of course this is really annoying. I already tried looking in the screensaver timeout settings (although none is set up). Also I need to unlock with CTRL+ALT+DEL, which isn't standard behaviour IIRC. I know maybe this might be better suited in a Windows 8 forum, but maybe this has to do something with the actual joining to a domain? Although this has never happened previously.
Cheers, jw