I don’t have my Authenticator device

If you have lost your phone that was using the Microsoft Authenticator app and cannot access your account, you will need to reset your Multi-Factor Authentication (MFA) settings. Here are the steps you can take:

1. Contact an Admin: If you are part of an organization, reach out to your IT administrator. They can reset your MFA settings for you. The admin will need to sign in to the cloud service portal and follow the necessary steps to manage your MFA settings.
2. Use Alternative Verification Methods: If you have set up alternative verification methods (like SMS or a phone call), you can use those to receive a verification code.
3. Account Recovery: If you are unable to contact an admin or do not have alternative verification methods set up, you may need to go through the account recovery process provided by Microsoft. This often involves verifying your identity through other means.
4. Re-register MFA: Once you regain access to your account, you should re-register your MFA settings on your new device to avoid similar issues in the future.

Make sure to follow your organization's policies regarding account recovery and MFA setup.

References:

• Can't use Azure Multi-Factor Authentication to sign in to cloud services after you lose your phone or the phone number changes
• Frequently asked questions about Microsoft Entra multifactor authentication

Dear @Tonoy Dass,

Good day. Thank you for posting your question in the Microsoft Q&A forum!

I’m very sorry for the inconvenience you’ve experienced, based on the details you shared. There is something I need to confirm with you is: Do you use Microsoft 365 Business account (provided by your organization/school) or Personal account? 

If you are using a personal account (not a business account), you may try filling out Microsoft’s account recovery form. Recover your account

If you are using a work/school account, I would recommend you contact your IT Admin to reset your MFA settings through the Microsoft Entra Admin Center. Ask your administrator to follow these steps:   

1. Sign in to the entra.microsoft.com as at least one Authentication Administrator. 
2. Select User > All user.  Select the user (your account) to act on and select Authentication methods then select Require re-register of multi-factor authentication.  

Require re-register MFA:  This disables all previous authentication methods. You'll then be prompted to configure a new MFA authentication method the next time you try to sign in, so you can set up from the start and add a new authenticator app.  

For step-by-step details, see the official Microsoft documentation: Manage authentication methods for Microsoft Entra multi-factor authentication - Microsoft Entra ID | Microsoft Learn    

If you’re unsure who the Global Admin is within your school account's organization, you can find guidance on locating them here: How do I find my Microsoft 365 admin? - Microsoft Support  

Note: Once re-registration is triggered, all your existing MFA methods such as phone numbers, Authenticator app, or other verification options will be removed. You will need to set up new MFA methods during your next login. Please ensure you have access to a valid phone number or the Microsoft Authenticator app before attempting to sign in again. 

Please feel free to reply below if you have any update or further concern.  

I appreciate your patience, and I am here to help. Looking forward to your response!

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