New version of Outlook

To go back to the previous Outlook look/version on Windows:

1. Open new Outlook.
2. In the top-right corner, turn off the New Outlook toggle.
3. Confirm the switch when prompted.

That will reopen classic Outlook.

If the toggle is not visible in new Outlook, use Help > Go to classic Outlook.

Additional notes:

• It is possible to switch back to classic Outlook at any time.
• If classic Outlook shows File > Options > General > New Outlook options, clear Automatically switch me to new Outlook to avoid the one-time automatic switch when that option is available.
• If the toggle is missing in classic Outlook, the account may not be supported yet for switching, or an admin may have blocked the toggle.
• In business environments, starting from January 2025, classic Outlook users on the Current Channel with a Business plan may be automatically switched to new Outlook after notifications, but both users and IT admins can turn off that automatic switch.

References:

• Switch to new Outlook for Windows | Microsoft Support
• Getting started with the new Outlook for Windows | Microsoft Support
• Toggle out of the new Outlook for Windows | Microsoft Support