Hi Flo,
Did I get it right that the login and commands fail on the replica but everything is working on the master?
Yes, that is correct.
If that's the case, check on the master if the users contain an ipantsecurityidentifier. The users are replicated and should have the same content on master and replica.
They do now, after I did https://access.redhat.com/solutions/7052703 Still no login.