Microsoft 365 Email Syncing Issues Plague Mac Users Amid EWS Access Changes

If you're experiencing issues with Microsoft 365 email not syncing on your Mac, there are several steps you can take to troubleshoot the problem.

The first step is to test your email in Outlook on the web. If it's working correctly there, then the issue may be specific to the Mac app or its access path. Check the Mac app's connection, sign-in, updates, and account settings.

If you're using Apple Mail, check if it has stopped receiving Exchange email after October 1. This is due to a change in EWS access behavior that started rolling out on October 1. Ask your IT department to review the tenant's EWSEnabled setting and EWSAllowedAppIDs list for the affected application.

Another possible cause of syncing issues is a disconnected session, an offline app, or network restrictions. Check if you're in offline mode and clear any search or unread-only filters. Make sure Outlook isn't set to work offline and that there are no connection errors.