MFA Security Issues

How to Stop Unrequested Microsoft Sign-In Code Texts

Adam Davis Oct 9, 2026 868 views

Question details

The user is repeatedly receiving Microsoft sign-in verification codes via text message that they did not request, and wants to know how to stop them and ensure their account is secure.

How to Stop Unrequested Microsoft Sign-In Code Texts

Product: Microsoft Account
Device & OS: not provided
Scenario: Receiving unsolicited two-factor authentication (2FA) or single-use sign-in codes via SMS or email.
Observed behavior: Repeated text messages containing Microsoft sign-in verification codes are arriving on the user's phone without the user initiating a login attempt.

Before you start

Do not share the unexpected sign-in code with anyone or enter it into any unfamiliar prompts; the code itself is effectively protecting your account from unauthorized access.

Solution 1Recommended

Review Recent Activity and Secure Your Microsoft Account

Check your Microsoft account for unauthorized access attempts and update your security settings to block potential intruders.

Often, someone might be typing your phone number or email address by mistake when trying to log in. However, it could also be a deliberate attempt to access your account. Changing your password immediately breaks the cycle of automated login attempts triggering the texts.

Access your account security page

Navigate to the Microsoft account security dashboard (account.microsoft.com/security) in your web browser and sign in with your credentials.

Review recent activity

Click on 'Review my recent activity' to check for successful or unsuccessful sign-in attempts from unfamiliar locations, IP addresses, or devices.

Change your password

If you notice suspicious activity, return to the main security page, select 'Password security' or 'Change my password', and create a new, strong password.

Update recovery information

Navigate to 'Advanced security options' and verify that your alternative email addresses and phone numbers are accurate and up to date.

Review Recent Activity and Secure Your Microsoft Account

Account Safety Verified: If the sign-in attempts in your activity log show 'Unsuccessful', your account is safe. The text messages are proof that your multi-factor authentication successfully blocked the intruder.

Solution 2

Upgrade to the Microsoft Authenticator App

Shift from SMS-based codes to app-based authentication for a more secure and less intrusive login experience.

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Frequently Asked Questions

Why am I getting Microsoft single-use codes randomly?

You receive these codes when someone attempts to sign into a Microsoft account linked to your phone number or email. This frequently happens due to an innocent typo by another user trying to log in, but it can also indicate a bad actor trying to breach your account.

Can my Microsoft account be hacked just by receiving the text message?

No. Receiving the text message actually means your Two-Factor Authentication (2FA) is working correctly. As long as you do not share the code with anyone or approve the prompt on your device, the unauthorized person cannot access your account.

How can I block these annoying Microsoft text messages completely?

You cannot directly block Microsoft's automated SMS number without risking locking yourself out of your own account when you actually need a code. The best way to stop them is to change your password so the attempts fail earlier, and switch your primary authentication method to the Microsoft Authenticator app.

Microsoft Office Security Issues