Legacy Microsoft Outlook for Mac: Support will end

After October 2025, Microsoft 365 subscriptions associated with a Microsoft 365 account (personal, work, or school) will no longer be able to use legacy Microsoft Outlook for Mac. This transition marks a significant step towards a more robust, feature-rich, and secure email experience for all users. The latest version of Outlook for Mac has been part of the Microsoft 365 suite for the last four years. More than 95% of Microsoft 365 users have already moved from legacy Outlook for Mac to the new version. Learn more about the new features and benefits in our Outlook Blog and Release Notes. For information on what’s next, please follow the Microsoft 365 Roadmap for Outlook for Mac. How this will affect your organization: You are receiving this message because our reporting indicates your organization may be using legacy Outlook for Mac. We do not have access to the list of users, but we might be able to provide a list of device IDs if your tenant allows legacy Outlook to upload telemetry. Users will no longer be able to switch back to legacy Outlook for Mac after this change is implemented. This change affects ONLY Outlook for Mac What you need to do to prepare: This change will happen automatically by the specified date. No admin action is required. Please notify your users about this change and update relevant documentation as appropriate. Learn more: End of support for legacy Outlook for Mac – Microsoft Support Message ID: MC994282

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