{{lastupdated_at}} by {{lastupdated_by}} h1. Opening Another Mailbox in OWA # Open Outlook web !outlookweb.png! # click on the upper right hand account portrait. !outlookmenu.png! # click Open Another mailbox # type name of mailbox you wish to open (must be one you have permission to!) !openmailbox.png! # mailbox will open in another tab or window.