If you're locked out of your account due to issues with the Microsoft Authenticator app and SMS verification, and you have access to your account through a PC, here are some steps you can take:
- Contact Microsoft Support: Since you mentioned that you are having difficulty reaching support, try calling the Microsoft support hotline directly. You may need to explain your situation clearly, especially that you are locked out of your account and need assistance with resetting your 2FA methods.
- Use the YubiKey: Since you have access through a YubiKey, ensure that you can use it for any necessary authentication processes. If you can access your account settings, look for options related to security or 2FA management.
- Create a New Trial Tenant: If you cannot resolve the issue through support, consider setting up a new trial tenant. This will allow you to submit a support request to Microsoft regarding your locked account. Make sure to provide all necessary details about your locked account when raising the ticket.
- Prepare for Verification: Be ready to verify your identity and administrative rights for the locked tenant. This may involve answering security questions or providing account details.
- Patience and Persistence: The resolution process may take time, so be patient and persistent in following up with Microsoft support.
These steps should help you regain access to your account or at least get in touch with someone who can assist you further.
References:
- How Do I Regain Access to My Account After Losing Access to Microsoft Authenticator? (Urgent Request). - Microsoft Q&A
- I have a Micrsoft business account and I am the admin and the only user registered under this account. I can't log in because i have replaced my phone and the authenticator doesn't work. - Microsoft Q&A