Global Admin MFA Lockout - Only Administrator in Developer Sandbox

Mayant Pratap 0 Reputation points
2026-07-31T10:59:04.9933333+00:00

Only Global Administrator:

Microsoft Authenticator device lost.

No alternate MFA methods available.

No additional Global Administrators exist.

Requesting guidance for sandbox recovery or MFA reset.

Microsoft 365 and Office | Development | Microsoft 365 Developer Program
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  1. Helen Luu 1,865 Reputation points Independent Advisor
    2026-07-31T12:55:09.1266667+00:00

    Hello @Mayant Pratap,

    Based on the information you shared, I understand that you are having an issue related to your Microsoft Authenticator app, which is not working as expected and you have no alternative MFA method such as Phone or email. 

    Since you are the only user or administrator of the tenant, you will need to contact the Microsoft Support Data Protection team to have your MFA reset. Please locate the appropriate Microsoft support hotline and contact the frontline support team so they can raise a ticket on your behalf: Customer service phone numbers - Microsoft Support     

    Please note that this is a user-to-user support forum. Only Data Protection team can help you to revoke the session and reset your password, account, MFA... 

    Data Protection Team will first verify your ownership of the account and revoke your MFA once confirmed. After that, you can set up the Microsoft Authenticator app again on your new device.  

    Feel free to let me know if there are any updates or if you have further questions regarding this issue. 

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