https://status.hm.edu/en/affected/exchange/ Incident history github.com/cstate en 2026-10-07T15:24:00+02:00 2026-10-07T15:24:00+02:00 https://status.hm.edu/en/issues/2026-10-07-synchronisationsfehler-von-apple-mail-kalender-und-kontakten-mit-exchange-online-unter-macos/ Wed, 07 Oct 2026 15:24:00 +0200 https://status.hm.edu/en/issues/2026-10-07-synchronisationsfehler-von-apple-mail-kalender-und-kontakten-mit-exchange-online-unter-macos/ Ongoing <p>Currently, in some cases, synchronization of Apple Mail, Calendar, and Contacts with Exchange Online is not possible on macOS. HM-IT is working to resolve the problem.</p> <p>So that you can still access Exchange Online on macOS, we recommend using Outlook for macOS: <a href="https://www.microsoft.com/de-de/microsoft-365/outlook/outlook-for-mac?market=de">https://www.microsoft.com/de-de/microsoft-365/outlook/outlook-for-mac?market=de</a></p> <p>Background: Apple Mail, Calendar, and Contacts use the <code>EWS</code> protocol to connect to Exchange Online. As Microsoft had long announced, the protocol was shut down at the beginning of October. Apple has announced that with a future update to macOS 27, these apps will be switched to the Microsoft Graph interface. Apple has not yet provided a date.</p> <p>The use of <code>EWS</code> can be extended manually by having administrators set up the appropriate allow list. HM-IT has taken these steps and has explicitly authorized Apple to continue using EWS.</p>