@PitaJ Oh, sorry, I meant we have an explicit group for guests, who are registered users. The forum is completely closed for public and used by members of our organization and ~some~ people, who are not official members but let's say close to it. We want to ban this group of users from some categories. So we need an explicit member group. The problem: Our organization is split into several local federations, who have their explicit groups in the forum. New users are assigned to their local group when they were invited. As you can only set one pre-defined group during invitation, we cannot put new users into their local group and the members group. So all users, who are not assigned to the guest group should automatically become members. Otherwise I expect us to get into trouble with the user management. Admins have their extra-accounts, for administration, which should simply remain admins... Hope it is clear now.