Add a Shared Mailbox to Outlook for Mac

Instructions

1. Open Outlook.
2. In the Tools menu, choose Accounts, and select the account that has access to the mailbox.
3. Choose Shared With Me tab.
4. Choose “+” to add a shared or delegated mailbox.

(You can also do this)

5. Alternatively, you can also go to File > Open > Shared Mailbox, to open a shared or delegated mailbox.