Lost access to Two-Factor Authentication as admin (and only user) of Office 365

Question

Can't sign in anywhere due to 2FA requirement.
My account is : z****@181w46.onmicrosoft.com
I lost my access to microsoft authenticator app & cannot login to my microsoft account. Please help me to reset my 2FA of z****y@181w46.onmicrosoft.com

Answer 1

as miyeon has already said issues related to Authenticator are beyond the scope of Microsoft forum support however you could try these two things: I understand the difficulty of losing access to your Two-Factor Authentication (2FA) method as the admin and only user of an Office 365 account. Here are the steps to address this issue:

1. **Use Alternate Verification Methods**:
   • If you've set up alternate verification methods like a secondary email or phone number, use these to verify your identity and sign in.
2. **Microsoft Authenticator App**:
   • If you have a new phone but still have the same phone number, you can set up the Microsoft Authenticator app again on your new device. Microsoft offers guidance on how to set up the Authenticator app.](https://support.microsoft.com/en-us/account-billing/set-up-the-microsoft-authenticator-app-as-your-verification-method-334521a3-d54d-49f5-8b86-2a2ed1de8d4d%29.)

Microsoft’s direct support will be your most reliable resource for detailed steps and assistance, especially considering the sensitivity of account access and security issues. Remember, it's crucial to keep all account recovery information up to date to avoid such issues in the future.

Answer 2

Hi Anh Nguyen8，

Thanks for visiting Microsoft Community. 

I understand that you are currently experiencing problems with Authenticator. Unfortunately, issues related to Authenticator are beyond the scope of Microsoft forum support, and there is a dedicated section in Microsoft Learn (English only) for this issue, designed to support Authenticator users like you.

This is the link to the forum where you can suggest details and share your ideas for solving the problem.

In closing, while I can't help you further, I hope the information I've provided will help you find a better direction. I will file this question away in case our great volunteers come up with ideas for you.

Best regards

Miyeon |Microsoft Community Support Specialist