On October 31, 2014, Microsoft released Outlook for Mac (v15.3 build 141024) with Office 365 (a software as a service licensing program that makes Office programs available as soon as they are developed). So if you are still struggling, make sure the Mac user has their Outlook version up to date. With Service Pack 1 (v 14.1.0), published on April 12, 2011, Outlook can now sync calendar, notes and tasks with Exchange 2007 and Exchange 2010. 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. This is going to be fun to explain to a die hard 'New Outlook' user who has migrated from Microsoft servers to 3rd party servers. 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. Almost 2022 and Microsoft still don't allow Outlook (Mac edition) to add Exchange on Premise on the 'New Outlook', I guess it's a marketing decision to get more users on the Microsoft inhouse services. 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 () The first step in this method is to export the data (.olm file that you can save to any location) from your legacy outlook profile on the Mac ( Export items to an archive file in Outlook for Mac ).In the Tools menu, choose Accounts, and select the account that has access to the mailbox.Hear all the news directly from the Outlook engineering team in Sunnyvale. To add the shared Outlook mailbox on Mac: New Outlook For Mac - YouTube See the new features and user interface coming to Outlook for Mac this year.

As of Sept 2021, you are now able to add shared mailboxes to Outlook for Mac, it just takes some extra steps:

New outlook for mac exchange