Outlook Mac - Adding a Shared Mailbox

-Make sure Outlook 2016 or 2019 on Mac is selected

1. On the Tools menu, click Accounts  > Advanced > Delegates.

-Click "Accounts" from the "Tools" menu.



-Click Advanced



2. Add the mailbox under Open these additional mailboxes

Note: If you have permissions to custom folders in the mailbox but not to the top-level mailbox folder, the custom folders will not appear in the folder list. Only default folders that you have permissions to, such as Inbox, Sent Items, Deleted Items, and Calendar, will appear in the folder list without top-level mailbox folder permissions.



After closing the "Accounts" window - Outlook will update and you will be able to see the mailbox in the left side-pane.