AT&T MERLIN MAIL System Programming And Maintenance Manual page 96

MERLIN MAIL—ML System Programming
4. [6] to change the owner of the General Mailbox.
The current General Mailbox owner's extension plays, followed by a prompt
to enter the General Mailbox owner's number.
5. Enter the new General Mailbox owner's extension number followed
by [ # ]
The General Mailbox owner's extension number plays, followed by the
System Parameters Menu.
3-34
Changing Factory-Set Mailboxes