MFA & Verification Issues

How to Update the Microsoft 365 Admin Portal Verification Phone Number

Algirdas Jasaitis Sep 30, 2026 869 views

Question details

The user needs to update the verification phone number associated with their Microsoft 365 administrator account to regain access to the admin portal.

How to Update the Microsoft 365 Admin Portal Verification Phone Number

Product: Microsoft 365
Device & OS: not provided
Scenario: Attempting to log into the Microsoft 365 admin portal but being blocked because the multi-factor authentication (MFA) system is requesting a verification code sent to an old or inaccessible phone number.
Observed behavior: The portal denies administrator access, preventing the user from managing the Microsoft 365 tenant due to the inability to complete the two-step verification process with the old phone number.

Before you start

Check if there is another active global administrator in your organization's Microsoft 365 tenant, as they have the permissions to quickly reset your multi-factor authentication methods.

Solution 1Recommended

Ask Another Administrator to Reset Your Authentication Methods

This is the fastest method if your organization has multiple global administrators. Another admin can force a re-registration of your security info via Microsoft Entra ID.

If you are locked out because of an old phone number, any other user with Global Administrator privileges can reset your multi-factor authentication (MFA) settings. Once reset, you will be prompted to register a new phone number upon your next login.

Contact another global administrator

Reach out to a colleague who holds Global Administrator rights within your Microsoft 365 tenant.

Access Microsoft Entra ID

Ask the administrator to log into the Microsoft Entra admin center (formerly Azure Active Directory) using their admin credentials.

Locate your user account

Have them navigate to 'Users' > 'All users' in the left-hand menu, and search for your specific admin account.

Require MFA re-registration

Under the 'Authentication methods' section of your user profile, ask the admin to click 'Require re-register MFA'. This clears the old phone number requirement and allows you to set up a new one when you sign in.

Ask Another Administrator to Reset Your Authentication Methods

Best Practice: To avoid this situation in the future, it is highly recommended to maintain at least two global administrator accounts (a 'break-glass' account) in your tenant.

Solution 2

Update the Number in Your Account Security Settings

Use this solution if you still have temporary access to the old phone number or are currently logged in on a trusted device.

Solution 3

Contact Microsoft Data Protection

If you are the sole administrator for your tenant and have lost complete access to your verification phone number, you must escalate the issue to Microsoft's Data Protection team.

Free Microsoft Office alternative

Stay Productive While Recovering Your Admin Access

Waiting for Microsoft 365 administrator access recovery can disrupt your workflow. WPS Office provides a powerful, free, and lightweight alternative to keep you working on your important files without skipping a beat. It seamlessly handles all major document formats, ensuring you stay productive even when your primary cloud services are temporarily inaccessible.

1. Download and Install: Visit the official WPS Office website to download the free installer for your operating system.
2. Open Your Office Files: Launch WPS Office and directly open your existing .docx, .xlsx, or .pptx files saved locally on your device.
3. Edit and Save Seamlessly: Edit your documents using the familiar interface and save them in their original formats for perfect compatibility.

Fully compatible with Microsoft Word, Excel, and PowerPoint formats (.docx, .xlsx, .pptx).Free and lightweight, allowing for a fast installation and minimal system resource usage.Features a familiar, easy-to-use tabbed interface so you can start working immediately.Built-in PDF editing and conversion tools at no extra cost.

Frequently Asked Questions

Can a Microsoft community moderator help reset my administrator account?

No. Due to strict security and privacy policies, community forum moderators and standard support agents do not have the backend permissions required to reset multi-factor authentication for Microsoft 365 administrator accounts. You must contact the Data Protection team by phone.

How long does it take for Microsoft Data Protection to restore my admin access?

The account recovery process can take anywhere from a few days to a couple of weeks. The Data Protection team must conduct thorough identity verification and security checks to ensure your tenant is protected from unauthorized access.

How can I prevent getting locked out of my Microsoft 365 admin portal again?

To prevent future lockouts, you should configure multiple authentication methods for your account (such as the Microsoft Authenticator app and an alternate email). Additionally, create a secondary 'break-glass' global administrator account that is highly secured but kept separately for emergencies.

Login & Account Issues