Sync issues between iPhone SE and Windows11 Outlook calendar

To troubleshoot the synchronization issues between your iPhone SE and Windows 11 Outlook calendar, you can follow these steps:

1. Re-create the ActiveSync relationship on your iPhone SE. This involves removing the existing ActiveSync account and then setting it up again. Here’s how:
   • Go to Settings on your iPhone.
   • Select Mail > Accounts.
   • Tap on your Exchange account and choose Delete Account.
   • After deleting, go back to Accounts and select Add Account to set up your Exchange account again.
2. Check for any Outlook add-ins that might be affecting calendar synchronization. Disable any add-ins that are used for calendar management and see if that resolves the issue.
3. Restart your iPhone after making these changes to ensure they take effect.
4. If the problem persists, consider using the Microsoft Support and Recovery Assistant to diagnose and fix issues with your Outlook calendar. This tool can help identify problems related to syncing and permissions.
5. Ensure that your iPhone is updated to the latest iOS version, as pending updates can sometimes cause synchronization issues.

By following these steps, you should be able to resolve the synchronization issues between your iPhone SE and Windows 11 Outlook calendar.

References:

• Calendar on mobile device isn't synced to the calendar in an Exchange Online mailbox when you use Exchange ActiveSync
• Scan Outlook calendar by using Microsoft Support and Recovery Assistant