We tried, but could not find /doku.php?id=doku.php.faq:everydayuse:how_do_i_create_a_public_mailbox_to_be_accessed_by_several_users&do=login§ok=f1dea23f9caf74f6d1fee6f75b6e5cf6
But hey, you don't have to leave empty handed!
Here are some things you can try instead: