Set up your Microsoft 365 sign-in for multi-factor authentication By setting up MFA, you add an extra layer of security to your Microsoft 365 account sign-in For example, you first enter your password and, when prompted, you also type a dynamically generated verification code provided by an authenticator app or sent to your phone
Multifactor Authentication (MFA) | Microsoft Security Strengthen your organization’s security with Microsoft Entra ID Multifactor Authentication (MFA) Protect identities, enable secure sign-in, and prevent breaches