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=166e5faaff7d4feab08d14af8dee9d75
But hey, you don't have to leave empty handed!
Here are some things you can try instead: