How to turn off New Outlook for Mac

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With Mac OS Catalina, Big Sur, and Monterey Outlook for Mac is allowing people to install an Alpha Version of their latest Outlook for Mac. Enabling "New Outlook" will prevent CompanionLink for Mac from being able to sync. Use the following steps to disable the "New Outlook" option:

Outlook for Mac 16.58 and Higher:

  1. Open Outlook for Mac.
  2. Select Help in the Tool bar.
  3. Select "Revert to Legacy Outlook".

Outlook for Mac 16.57 and lower:

  1. Open Outlook for Mac.
  2. On the Outlook title bar (in the top right) set the "New Outlook" switch to the Off position.

New Outlook for Mac

Outlook for Mac has always been significantly different from Outlook for the PC. It is slower, more prone to errors, and does not follow the general design guidelines of Outlook.

Updates for Outlook on the Mac


In Fall 2020 Microsoft has introduced the "New Outlook for Mac", which contains some feature adjustments. It is clear that Microsoft's Mac team is separate from their Windows team, in that none of these improvements bring it closer to the Windows version, nor do they improve the performance of Outlook. They are simply "New".

A pop-up message offers the New Outlook. Once you agree, it will tell you that IMAP and iCloud mail folders are not supported.

New Look for the Ribbon

Microsoft’s Ribbon interface, the primary feature of Outlook 2016, has been removed. The Mac interface is now a combination of macOS and Fluent design. The Email interface features less white space which makes reading and writing emails more efficient. There is Dark mode.

New Contacts


Microsoft has also improved the way contacts work in Outlook for Mac. The People section now separates out contacts and co-workers from events and email messages, and it’s easier to see frequent contacts or simply mark existing ones as favorites.

New Calendar


Calendars can now be grouped by ones you own, those that are shared with you, and group calendars found on Microsoft 365. There’s a Microsoft Teams meeting toggle and the ability to click and drag over the calendar to create entries. Search should also be a lot more relevant now, as Outlook for Mac is powered by the same Microsoft search found elsewhere in Office 365.

Future of Outlook for Mac

Microsoft claims the New Outlook will be faster and more reliable than Outlook for Mac. Currently, however, there are obvious holes in the Task app, and lack of support for the most common mail folders. For business use, we recommend turning New Outlook off until it gets finished, which given Microsoft's history on the Mac, will be never.