MFA & Verification Issues

How to Regain Access to Microsoft Authenticator After a Phone Reset

Maira Mehtab Sep 22, 2026 869 views

Question details

The user needs to recover access to a Microsoft 365 administrator account after losing the Microsoft Authenticator app due to a device factory reset.

Product: Microsoft Authenticator
Device & OS: not provided
Scenario: Attempting to log into a Microsoft 365 administrator account but being blocked by a two-factor authentication prompt because the authentication app and recovery codes are no longer available.
Observed behavior: The login process requests an authentication code that cannot be generated, completely locking the administrator out of the Microsoft 365 account.

Before you start

Before reaching out to support, ensure you have your Microsoft 365 domain name, account billing details, and any organizational identification ready to help verify your identity.

Solution 1Recommended

Contact Microsoft Support for Security Verification

Since the account is an administrator account and no backup codes are available, the only path to recovery is having the Microsoft Data Protection team manually verify your identity and reset your MFA settings.

Standard password resets will not bypass the Authenticator prompt for admin accounts. You must escalate the issue through Microsoft's official phone support to regain access.

Find the official customer service number

Visit the official Microsoft Customer Service phone numbers page (https://support.microsoft.com/en-us/topic/customer-service-phone-numbers-c0389ade-5640-e588-8b0e-28de8afeb3f2) to find the correct dial-in number for your specific region and country.

Navigate the automated phone menu

Call the designated support number and follow the automated voice prompts. Select the options for 'Business Support' and 'Administrator account lockouts' to route your call correctly.

Request a transfer to the Data Protection team

Once connected to a representative, explain that you are the sole Microsoft 365 administrator, your phone was factory reset, and you have no backup recovery codes. Specifically request that your case be transferred to the security or identity-verification team (Data Protection team).

Verification Timeline: The identity verification process by the Data Protection team is rigorous and can take several days to weeks to ensure your organization's data is safe from unauthorized access.

Free Microsoft Office alternative

Keep Working Without Cloud Interruptions Using WPS Office

While you are waiting for Microsoft Support to verify your identity and restore your admin access, you don't have to stop working. WPS Office is a lightweight, free alternative that lets you create and edit your documents locally without requiring complex cloud authentication.

1. Download the software: Visit the official WPS Office website and click the free download button for your operating system.
2. Install WPS Office: Run the downloaded installer file and follow the quick on-screen instructions to complete the setup.
3. Open your files: Double-click your existing Word, Excel, or PowerPoint files to open them in WPS Office and continue your work without logging into Microsoft 365.

Fully compatible with Microsoft Office formats including .docx, .xlsx, and .pptx.Requires no complex cloud authentication to edit your local files.Free, lightweight, and installs in minutes so you can resume work immediately.Familiar user interface ensuring a seamless migration and zero learning curve.

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Frequently Asked Questions

Can I restore Microsoft Authenticator if I didn't turn on cloud backup?

No. If cloud backup was not enabled before the phone was factory reset, the account tokens cannot be restored. You must either re-add the accounts manually by scanning new QR codes or contact your IT admin/support for a reset.

What if there is another global admin on our Microsoft 365 account?

If your organization has another global administrator, they can simply log into the Microsoft 365 admin center, go to Active Users, select your profile, and click 'Require re-register MFA'. This allows you to set up the Authenticator app again on your fresh device.

Can I use SMS or email instead of the Authenticator app?

If you previously set up an alternative authentication method (like SMS or an alternate email) in your Microsoft 365 security info, you can select 'Sign in another way' on the login screen. If the Authenticator app was the only method configured, you must go through Microsoft phone support.

Login & Account Issues