03/07/2026
Attention iPhone users!!
"In early 2026, Apple Mail users are experiencing significant Exchange connectivity issues due to Microsoft deprecating Exchange Web Services (EWS) in favor of Microsoft Graph API. Users report "account not found" errors, sync failures, and the inability to re-add accounts on both macOS and iOS. Common fixes include removing and re-adding the account, using the official Outlook app, or checking for Microsoft service status.
Key 2026 Issues & Solutions
• EWS Deprecation (October 2026): Microsoft is phasing out EWS, which causes older versions of Apple Mail to stop working with Exchange Online. This is forcing a transition to modern authentication (Graph API).
• Connection Errors (Error 3): Users on Reddit and Microsoft Learn are reporting com.apple.accounts error 3 when attempting to re-add Exchange accounts.
• Temporary Fixes:
o Remove/Re-add Account: Deleting the account from Apple Mail and adding it back often resolves immediate sync issues.
o Use Outlook App: Switching to the Microsoft Outlook app for iOS/macOS is the most reliable workaround until Apple updates Mail
o Check Keychain (Mac): Clear Keychain Access entries related to "Exchange" or "Office".
• iOS 26 Specifics: Users have experienced issues with HTTP/3 configuration changes affecting Exchange Online.
If you are experiencing these issues, updating your operating system and using the Outlook app is recommended until a permanent fix is released, notes Microsoft Learn. "