---
title: "Apple to fix Mac apps affected by Microsoft Exchange Web Services retirement"
description: "Apple says a macOS 27 update will restore Mail, Calendar, Contacts, Notes, and Reminders access for Exchange Online accounts."
url: https://mactoreality.com/apple-to-fix-mac-apps-affected-by-microsoft-exchange-web-services-retirement
published: 2026-10-04T02:07:00Z
updated: 2026-10-04T02:07:00Z
author: "Mac to Reality Newsdesk"
category: News
publisher: Mac to Reality
ai_assisted: true
apple_heat_impact: -1
---

# Apple to fix Mac apps affected by Microsoft Exchange Web Services retirement

*Apple says a macOS 27 update will restore Mail, Calendar, Contacts, Notes, and Reminders access for Exchange Online accounts.*

**Key points**

- Microsoft is retiring Exchange Web Services (EWS), affecting Mail, Calendar, Contacts, Notes, and Reminders on Mac when accessing Exchange Online accounts.
- Apple says a future macOS 27 update will switch the affected apps to Microsoft's replacement connection method.
- Microsoft began disabling EWS in October 2026 and plans a full shutdown by April 2027; administrators can temporarily approve apps before then.

Apple plans a future macOS 27 update that will move five built-in Mac apps to a new connection method, addressing disruption caused by Microsoft’s retirement of Exchange Web Services (EWS).

The change affects Mail, Calendar, Contacts, Notes, and Reminders when accessing work or school accounts hosted on Microsoft Exchange Online, [AppleInsider](https://appleinsider.com/articles/26/10/02/apple-plans-fix-as-microsofts-exchange-shutdown-disrupts-mac-email?utm_source=rss) reported. Microsoft began disabling EWS in October 2026 and will fully shut it down by April 2027. Apple says the update will move the affected apps to Microsoft’s replacement connection method.

iPhone and iPad apps are not affected because they use Exchange ActiveSync instead of EWS. In the meantime, administrators can temporarily keep approved apps connected before Microsoft’s full shutdown. Old Dominion University has recommended Mac users switch to Outlook while the problem persists.

Apple has not announced the exact release date of the macOS 27 update or which specific connection method it will adopt.

## Sources

- [AppleInsider: Apple plans fix as Microsoft's Exchange shutdown disrupts Mac email](https://appleinsider.com/articles/26/10/02/apple-plans-fix-as-microsofts-exchange-shutdown-disrupts-mac-email?utm_source=rss)

*This report was written by the Mac to Reality newsdesk with AI assistance from the sources listed above, under the editorial policy at https://mactoreality.com/editorial-policy.*