Add a shared folder in Outlook Online, not just another mailbox. If you don’t, you’ll see the mailbox in your navigation pane, but it will appear to be empty, because Exchange won’t let you get a folder listing. There is one complication here, though, a bizarre and non-intuitive hold-over from the earliest versions of Exchange in the 1990s: You will need at least Reviewer permissions on the root of the mailbox that contains the shared folder.

Select the mailbox that contains the shared folder(s) you want to open.Right-click on Folders in the navigation pane on the left.So if you are still struggling, make sure the Mac user has their Outlook version up to date.But you can still open the folder. This is because at the time, shared mailboxes were not supported: The Mac user was using the version of Outlook bundled with Microsoft Office 365. I figured this out because in March 2021 I created a shared mailbox in an Exchange Online (office 365) admin center (no on-premise) and while Outlook users using Windows were able to get the shared mailbox to show up, one Mac user was not able to get the mailbox to show up. Prior to September 2021, this was not possible. Choose + to add a shared or delegated mailboxĬheck this article for details Open a shared Mail, Calendar or People folder in Outlook for Mac ().In the Tools menu, choose Accounts, and select the account that has access to the mailbox.To add the shared Outlook mailbox on Mac: As of Sept 2021, you are now able to add shared mailboxes to Outlook for Mac, it just takes some extra steps:

Open shared inbox outlook