It sounds like your father's Outlook account is experiencing a frustrating issue with the guardian verification loop. This can happen if the account is mistakenly flagged as part of a Microsoft Family group or due to other verification settings.
Here are some steps you can take to try and resolve the issue:
- Check Microsoft Family Settings: If there is any possibility that the account is linked to a Microsoft Family group, check the family settings. You might need to remove the account from the family group if it is mistakenly added.
- Contact Microsoft Support: Since the issue persists despite password resets and attempts on different devices, it would be best to contact Microsoft Support directly. They can escalate the issue and may be able to manually review or unlock the account. You can find the appropriate support contact for your region at the Microsoft support page.
- Use Security Information: If the account has security information set up, your father might be able to reset his password using that information, which could help in bypassing the verification loop.
- Try Different Browsers/Incognito Mode: Although you mentioned trying multiple browsers, ensure that you also try using incognito or private mode to eliminate any caching issues that might be causing the loop.
If these steps do not resolve the issue, reaching out to Microsoft Support is the best course of action for urgent access to the account.
References:
- Solve account access problems
- Confirm that you're using the correct credentials to sign in
- Customer Support Portal - Troubleshoot Microsoft Identity Platform login
- Respond to a compromised cloud email account
- A federated user is repeatedly prompted for credentials during sign-in to Microsoft 365, Azure or Intune