Users are logged in with a temporary profile

I set up our server with UCS 5.0. It also goes so far. The connection of a PC with the domain under Win10 also worked. When I logged in with the administrator and my user, the profile directory was created accordingly on the PC and under UCS. Unfortunately, after the third user, this no longer worked! The roaming desktop was activated for the users, as well as for my user. Does anyone have any idea why, starting with the third user in Win10, everyone is only logged in with a temporary profile?