1. thanks for that I will try it
2. I need both group users to be able to send messages to the Admins;
If I don’t let them add themselves to groups, then I need to do that manually. If I let them do that, they can see all groups including Admin as choices in the mail settings (front-end).
If I need to do that, I will. I was just asking that question because I was not sure what is possible to do.

Thank you for the super fast reply.