It is usually not the same people who run it and who create users. You don’t want to bother the admin every time you add a new email address. But an admin UI i

It is usually not the same people who run it and who create users. You don’t want to bother the admin every time you add a new email address. But an admin UI is more than just for creating mailboxes. It can also manage quotas, the spam filter, provide setup instructions for the end users, …