What is MFA (Multi Factor Authentication)? How to turn on MFA for all users in my Microsoft Baseline account?

MFA (Multi Factor Authentication) is an authentication method that requires the user to provide two or more verification factors to gain access to an online service like Microsoft 365.

MFA is also called Two Factor Authentication, or Two-Step Verification.

If you are the administrator of your Microsoft 365 Business account, you can follow this tutorial to turn on or turn off MFA for all or some users in your organization.

1. Sign in to your Microsoft Business Account and navigate to Microsoft 365 admin center. Or go to https://admin.microsoft.com/ directly.

2. Click and open the admin menu below the account menu at the top left corner of the screen.

3. Select "Active Users". You see a list of active users in your organization.

4. Click "..." above the list and select "Multi-factor authentication". You see a list of active users with their Multi-Factor Auth Statuses.

5. Select all or some users and click "Manage user settings". You see a settings dialog box.

6. Check "Restore multi-factor authentication on all remembered devices" to turn on Multi-Factor Authentication.

7. Click "Save" to save the change.

⇒ Change Multi Factor Authentication Options

⇐ Turn Off/On Microsoft Security Defaults

⇑ Microsoft 365 for Business Admin

⇑⇑ Microsoft 365 - Frequently Asked Questions