Accessing a Shared Mailbox with Outlook for Mac
Open the Outlook App. Click on “Outlook” in the menu bar in the top left corner.
Select “Settings” in the drop down menu.
Click on “Accounts”.
Click on on the arrow next to the Default tag.
Click on the arrow on under the Delegates & Sharing section.
Under the Shared With Me section, click on the “+” button.
Type the email address of the mailbox you would like to add. Select the mailbox from the list. Click “Add”
The mailbox should appear under the Shared With Me section. Close the Accounts box.
The mailbox will display on the left side of Outlook.