Adding a shared or delegated @northwestern.edu (Microsoft 365) account in Outlook Web App (OWA)
A shared mailbox can be used by multiple users to read and send email messages. It can also be used to provide a common calendar, allowing multiple users to schedule and view vacation time, meetings, or work related commitments. Before you can add any shared mailbox, the mailbox's owner must first give you access permission.
You can either add the shared mailbox to your folder list, which allows you to navigate between your mailbox and any shared boxes in the same screen, or you can open the shared mailbox in a separate browser window.