Outlook for Mac - Adding a Shared Email account
Below are the steps to add and view a shared email account with using Outlook for Mac.
To add and be able to check the shared email account on your Mac:
Open Outlook
In the Menu Bar navigate the following: File > Open > Shared Mailbox
Enter the shared email you wish to open and click Add
It will then show as a separate mailbox in your list of accounts.
Any calendars associated with the shared mailbox will also be visible inside your Outlook calendar section.