MFA & Verification Issues

How to Use SMS Instead of Microsoft Authenticator for MFA

Maira Mehtab Sep 22, 2026 868 views

Question details

The user wants to know how to set up SMS text messages as their primary Multi-Factor Authentication (MFA) method for Microsoft accounts instead of using the Microsoft Authenticator app.

Product: Microsoft Account / Microsoft Entra ID
Device & OS: not provided
Scenario: Changing the primary multi-factor authentication method used during login.
Observed behavior: The user aims to configure their account to receive verification codes via SMS text messages depending on their organization's security policy.

Before you start

Before modifying your authentication settings, be aware that using SMS is generally considered less secure than using an authenticator app, and its availability strictly depends on your organization's specific IT security policies.

Solution 1Recommended

Change Authentication Method as an End User

Use your Microsoft account Security info page to add a phone number and remove unwanted authentication methods.

If your organization permits SMS authentication, you can manually update your sign-in preferences to prioritize text messages over the Microsoft Authenticator app.

Access Security Info

Add a Phone Number

Click on 'Add sign-in method', select 'Phone' from the dropdown menu, and enter your mobile phone number. Follow the prompts to verify the number via an SMS code.

Remove Unwanted Methods

Once your phone number is successfully verified and set as an active method, locate the Microsoft Authenticator app in your list of methods and click 'Delete' to remove it, provided your organization's policy allows it.

Option Unavailable: If the Phone or SMS option is missing or you cannot remove the Authenticator app, your organization has restricted these actions. You must contact your IT administrator.

Solution 2

Enable SMS Authentication as an Administrator

Administrators can configure Microsoft Entra ID policies to allow users to verify their logins using SMS.

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Frequently Asked Questions

Why is the SMS option missing from my Security info page?

Your organization's IT administrator has likely disabled SMS verification due to security policies, requiring stronger authentication methods like an authenticator app or security key.

Is SMS authentication less secure than the Microsoft Authenticator app?

Yes, SMS is generally considered less secure because text messages can be intercepted, delayed, or vulnerable to SIM swapping attacks. Authenticator apps generate codes locally and are encrypted.

Can I use both SMS and the Authenticator app for my account?

Yes, provided your organization allows both methods. You can keep multiple verification options active on your Security info page and choose your preferred method when prompted during sign-in.

Login & Account Issues