This article is for the Outlook App known as Outlook (New) not Outlook Desktop/Classic.
To view shared mailboxes:
- Open the folder list (if it's not already open)
- Click the 3 bars at the top next to the Home tab
- Click the 3 bars at the top next to the Home tab
- Scroll down to the very bottom of the folder list and click the > next to "Shared with me"