Agorum Core - User berechtigen

Greetings

I installed Agorum core on a new UCS Domain server to check it out. However I cant login to Agorum.

In the app center it says " Benutzer müssen in der [Domänenadministration](javascript:void(0)) für diesen Dienst freigeschaltet werden" (User have to be permitted at the domain administration)

However there is no setting or group membership or whatever to activate my user, also a newly created user isnt able to login.

Am I missing something?