New Outlook for Mac
1. Open Outlook for Mac
2. Go to the Files Tab
3. Select Open -> Shared Mailbox
4. Type in the name of the Shared Mailbox, then click Add
5. The shared mailbox should appear on the left side below your account:
Old Outlook for Mac
1. Open Outlook for Mac
2. Go to the Tools Tab
3. Press the Accounts button
4. In the Accounts screen, press Advanced
5. In the Advanced screen, press the Delegates tab
6. Under the delegates tab, press the + icon under the “Open these additional mailboxes”
7. Type in the name of the shared mailbox and press Add
8. Press OK