Microsoft has begun deprecating Exchange Web Services (EWS) in Exchange Online, impacting native Apple Mail and Calendar clients on macOS that rely on this legacy protocol.
Technical Context
- Deprecation Path: Microsoft stopped EWS feature development in 2018 and is now rolling out the protocol disablement.
- Apple's Response: Apple is currently working to integrate the Microsoft Graph API into its native suite (Mail, Calendar, Contacts, Notes, Reminders) for a future macOS 27 update.
- Developer Workaround: Organizations requiring continued sync functionality should transition users to clients supporting Microsoft Graph, such as the Outlook app, or maintain EWS access via IT administrative overrides until the final sunset date of April 1, 2027.
- Platform Scope: This change is specific to cloud-hosted Exchange Online and does not affect on-premises Exchange servers or Exchange ActiveSync implementations on iOS/iPadOS.
منبع خبر: https://www.macrumors.com/2026/10/01/apple-mail-mac-stop-sync-microsoft-365/
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