Apple prepares Mac Mail fix as Microsoft retires Exchange connection

Apple is developing a fix for Mac apps losing access to Microsoft Exchange Online accounts, as Microsoft retires the Exchange Web Services (EWS) connection those apps depend on. The issue affects Mail, Calendar, Contacts, Notes, and Reminders. The problem stems from Microsoft beginning to disable EWS in October 2026, which Mac apps use to connect to work or school accounts. A university IT notice recommends Mac users switch to Outlook, while noting iPhone and iPad apps remain unaffected because they use a different connection method. Microsoft allows administrators to temporarily keep approved apps connected until EWS is fully shut down in April 2027. Apple plans a future macOS 27 update to move all five affected Mac apps to Microsoft's replacement connection method, though no release date has been announced.