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[THEME] Multi-Factor Authentication

The Multi-Factor Authentication theme ensures that MFA is properly configured and enforced across your Microsoft 365 environment. MFA is the single most important security measure for protecting user accounts.

What does Attic do?

Attic verifies MFA configuration at multiple levels and monitors for changes that could weaken your MFA posture.

The checks in this theme cover:

  • Security Defaults status and configuration
  • MFA enforcement for all administrators and users
  • Detection of admins without MFA enabled
  • MFA policy exclusion monitoring (detecting when users are removed from MFA requirements)
  • Microsoft Authenticator configuration: push notifications, number matching, additional context, and location display
  • Fraud reporting capabilities are enabled
  • SMS sign-in is disabled (weaker authentication method)
  • FIDO2 security key support is enabled
  • Conditional Access policies use authentication strength requirements for admins
  • Device code flow restrictions via Conditional Access
  • Monitoring of Conditional Access policy changes
  • Report-only policies are identified for review

Why is this important?

MFA blocks over 99% of credential-based attacks. Without MFA, a stolen password is all an attacker needs to access your environment. Attic ensures MFA is not only enabled, but configured with the strongest available methods and continuously monitored for gaps or weakening changes.

Checks in this theme

ID Check
CHK-1127 Security Defaults enabled
CHK-1328 MFA enforced for admins
CHK-1327 MFA for all users
CHK-1154 MFA exclusion added
CHK-1137 Admin without MFA
CHK-1140 Pushnotifications Microsoft Authenticator enabled
CHK-1141 MFA Number Matching
CHK-1142 Appname in MS Authenticator
CHK-1153 Location in MS Authenticator
CHK-1144 MFA Fraud Alerts enabled
CHK-1161 MFA Block OTP
CHK-1164 Block SMS sign-in
CHK-1168 Monitor Conditional Access
CHK-1170 FIDO2 Authentication
CHK-1171 Phishing-resistant MFA for Admins
CHK-1172 Block Device Code Flow Authentication
CHK-1173 CA Report-only policies present