Authenticator loop / new iphone

Question

I have a new ihpone, mail is working but calendar is not. Exchange is asking for Authenticator, however this is not working because of new phone. What to do?

Answer 1

To resolve the issue with the Microsoft Authenticator not working on your new iPhone for accessing your Exchange calendar, you will need to ensure that you complete the multifactor authentication (MFA) setup correctly. Here are the steps you can follow:

1. Use Your Old iPhone: If you still have access to your old iPhone, do not remove the Microsoft Authenticator app or factory reset the device until you have successfully set up your new iPhone. You will need your old device to complete MFA during the setup process.
2. Set Up MFA on New Device: When you attempt to access your Exchange calendar, you will be prompted for MFA. Use your old iPhone to approve the authentication request or enter the code generated by the Authenticator app.
3. Check Microsoft Authenticator Installation: Ensure that the Microsoft Authenticator app is installed on your new iPhone. If it is not, you can download it from the App Store.
4. Complete Device Enrollment: After signing in with your work account on a productivity app (like Microsoft Teams), complete the MFA requirements using your old device. This will help you enroll your new device properly.

If you encounter further issues, consider contacting your IT support for assistance, as they can provide specific help based on your organization's setup.

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References:

• Migrate to a new iPhone for work
• How Do I Regain Access to My Account After Losing Access to Microsoft Authenticator? (Urgent Request). - Microsoft Q&A