MFA & Verification Issues

How to Add a Phone Number When Microsoft Authenticator Fails

Maira Mehtab Sep 22, 2026 868 views

Question details

The user is unable to receive Microsoft Authenticator push notifications or codes and needs to bypass the app, reset their authentication methods, or add a phone number to regain account access.

Product: Microsoft 365 / Microsoft Account
Device & OS: not provided
Scenario: Attempting to sign in to a Microsoft account but failing because the required Microsoft Authenticator verification is not functioning or arriving.
Observed behavior: Sign-in is blocked because Microsoft Authenticator notifications do not arrive, leaving the user stuck on the verification code prompt without a configured phone backup.

Before you start

Verify whether your account is a personal Microsoft account or a work/school account managed by an organization, as the recovery process differs significantly for each.

Solution 1Recommended

Reset MFA via Your IT Administrator (Work or School Accounts)

Use this method if your account is provided and managed by an organization or educational institution.

Standard users in a Microsoft 365 business or education environment do not have the permissions to override multifactor authentication on their own. You must contact the system administrator to clear your current MFA sessions.

Contact your IT helpdesk

Reach out to your organization's IT department, system administrator, or helpdesk through an alternative communication channel.

Request an authentication reset

Ask the administrator to navigate to the Microsoft 365 Admin Center and select the option to 'Require re-registration of MFA' for your specific user account.

Re-register and add a phone number

Once reset, sign in to your Microsoft 365 account. You will be prompted to set up your security info again. Choose to set up a phone number for SMS or voice calls as your primary or backup method.

Admin Availability: If you do not know who your admin is, it is typically the person who gave you your user credentials or the technical support contact for your company.

Solution 2

Contact Microsoft 365 Support (Sole Administrators)

Follow these steps if you are the only global administrator for your Microsoft 365 tenant and are locked out.

Solution 3

Use the Personal Account Recovery Process

Use this method if you are locked out of a personal Microsoft account (such as Outlook.com, Xbox, or OneDrive).

Free Microsoft Office alternative

Experiencing Microsoft Account Lockouts? Try WPS Office

While you wait to regain access to your Microsoft 365 account, you do not have to stop working. WPS Office is a powerful, lightweight, and free office suite that allows you to create, edit, and view documents locally without requiring complex cloud authentication or forced MFA sign-ins.

1. Download the installer: Visit the official WPS Office website and download the free software for your operating system.
2. Install quickly: Run the lightweight installer and complete the setup in just a few clicks.
3. Open existing Office files: Right-click any of your existing Word, Excel, or PowerPoint documents on your local drive and select WPS Office to continue working immediately.

Free and lightweight office suite with no mandatory cloud-only sign-in hurdles.Seamlessly compatible with Microsoft Office formats, including .docx, .xlsx, and .pptx.Familiar user interface that allows you to start working immediately with zero learning curve.Robust offline capabilities so your productivity isn't halted by authentication server outages.

microsoft office alternative - wps office

Frequently Asked Questions

Can I add a phone number to Microsoft Authenticator if I cannot sign in?

No. If you are entirely locked out and MFA is required, you cannot add a phone number yourself. You must first have your IT admin reset your authentication methods or use the account recovery form if it is a personal account.

How do I change my primary MFA method from Authenticator to a phone number?

Once you successfully log in, go to your Microsoft account Security settings. Navigate to 'Advanced security options', select 'Add a new way to sign in or verify', choose 'Phone number', and follow the prompts to make it your default method.

What happens if I accidentally delete the Microsoft Authenticator app?

Deleting the app does not disable MFA for your account. You will stop receiving push notifications, which will lock you out unless you have previously configured a backup verification method like a phone number or an alternate email.

Why am I not receiving Microsoft Authenticator notifications?

This can happen due to a poor network connection, having 'Do Not Disturb' enabled on your device, strict battery optimization settings restricting the app's background activity, or if the digital token linking the app to your account has expired.

Login & Account Issues