
Dear Charles Kelly,
Thank you for reaching out to Microsoft Q&A Support.
Following a review of your inquiry, we would like to offer several solutions to help you remove the Microsoft Authenticator app from your iPhone:
- Option 1: Remove Authenticator via Security Info Page
- Navigate to https://mysignins.microsoft.com/security-info.
- Sign in using your Microsoft account credentials.
- When prompted to approve the sign-in via the Authenticator app, select the option:
- “I can’t use my Microsoft Authenticator app right now” or
- “Sign in another way”
- If alternative verification methods (such as SMS, email, or backup codes) are available, choose one to complete the sign-in process.
- “I can’t use my Microsoft Authenticator app right now” or
- Once signed in, locate the device associated with the Authenticator app under Security Info, and click “Delete” to remove it.
- Option 2: If you cannot access your account
If you cannot do the Option 1, may I know if you know any other Global Administrators in your organization?
If yes, please ask them to follow this article to proceed to reset your 2FA so that you could re-register again: Manage authentication methods for Microsoft Entra multifactor authentication - Microsoft Entra ID | Microsoft Learn
If no, then you are the only Global Administrator and you are completely locked out from the tenant. You might need to contact us via phone service number: Customer service phone numbers - Microsoft Support. The agent will be able to create a ticket for you under the affected tenant and then transfer this ticket to Data Protection team who could help you to regain access.
Please note that this team is always overwhelmed, so you might need to wait for them to call you, this should take 3-10 working days. I know that this is not a convenient solution to hear but it seems to be the only way, and it's recommended that you should have a secondary/backup Global Administrator to fix this issue on your own.
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