check before: 2025-10-31
Product:
Exchange, Microsoft 365 Apps, Microsoft 365 suite, Outlook
Platform:
Mac, Online, World tenant
Status:
Change type:
User impact, Admin impact, Retirement
Links:

Details:
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.
Change Category:
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Scope:
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Release Phase:
Created:
2025-02-01
updated:
2025-02-01
Task Type
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Docu to Check
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MS How does it affect me
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MS Preperations
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MS Urgency
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MS workload name
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summary for non-techies**
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Direct effects for Operations**
Loss of Access to Legacy Features
Users will lose access to features that are only available in the legacy version of Outlook for Mac, potentially disrupting workflows that rely on these features.
- roles: End Users, IT Support
- references: https://support.microsoft.com/office/end-of-support-for-legacy-outlook-for-mac-7b9cf644-7035-4345-a151-8c1c7a65ac25
User Experience Disruption
Users may experience confusion and frustration due to the sudden transition, especially if they are not adequately informed about the changes.
- roles: End Users, Training Coordinators
- references: https://techcommunity.microsoft.com/blog/outlook/keeping-our-outlook-personal-email-users-safe-reinforcing-our-commitment-to-secu/4164184
Incompatibility with Existing Integrations
Existing integrations or add-ins that work with the legacy version may not function properly with the new version, leading to potential disruptions in productivity.
- roles: End Users, Application Developers
- references: https://learn.microsoft.com/officeupdates/current-channel
Increased Support Requests
The transition may lead to an increase in support requests as users encounter issues or require assistance with the new version.
- roles: IT Support, Help Desk Staff
- references: https://www.microsoft.com/microsoft-365/roadmap?msockid=165f8b1203726cfe0ed49e3207726225&filters=Outlook%2CMac
Training and Documentation Needs
There will be a need for updated training materials and documentation to help users adapt to the new version, which may not be ready in time for the transition.
- roles: Training Coordinators, IT Support
- references: https://techcommunity.microsoft.com/category/outlook/blog/outlook
Configutation Options**
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Potentional Risks**
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IT Security**
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explanation for non-techies**
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** AI generated content. This information must be reviewed before use.
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Last updated 5 days ago