How Can I Effectively Configure A Hybrid Multi-factor Authentication (MFA) Solution That Incorporates Both Time-based One-time Passwords (TOTPs) And Universal 2nd Factor (U2F) Tokens, While Also Ensuring Seamless Integration With Our Organization's Existing Single Sign-on (SSO) Infrastructure And Active Directory Federation Services (ADFS) Setup?

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To configure a hybrid MFA solution integrating TOTPs and U2F tokens with the organization's SSO and ADFS setup, follow this structured approach:

  1. Assessment and Planning:

    • Infrastructure Review: Confirm the ADFS version (ideally ADFS 2019 for better MFA support) and existing authentication methods.
    • User Requirements: Identify user groups (admins, remote workers) and their device capabilities to determine appropriate MFA methods.

  2. MFA Solution Selection:

    • Choose a solution that supports both TOTP and U2F. Consider Azure MFA for TOTP via Microsoft Authenticator and YubiKey for U2F. Ensure compatibility with ADFS.

  3. Authentication Flow Design:

    • Provide users with the option to choose between TOTP and U2F. Enforce MFA for all users, with TOTP as primary and U2F as backup. Implement conditional access for sensitive resources.

  4. Integration with ADFS:

    • Utilize ADFS as the identity provider. If MFA isn't natively supported, install an MFA adapter. Ensure SAML or WS-Federation protocols correctly handle MFA tokens.

  5. User Enrollment:

    • Offer a self-service portal for enrollment. Users can scan a QR code for TOTP or register U2F keys. Implement backup methods and recovery processes.

  6. Testing:

    • Conduct thorough testing in a non-production environment to ensure seamless integration and user experience. Test various scenarios, including fallback methods.

  7. Security Policies:

    • Enforce MFA for all users, set up a grace period for enrollment, and ensure secure communication channels (HTTPS, encryption).

  8. Monitoring and Logging:

    • Implement logging and monitoring tools to track MFA usage and security events. Set up alerts for suspicious activities.

  9. User Communication and Training:

    • Inform users about the MFA rollout through various channels. Provide guides and training sessions for smooth adoption.

  10. Maintenance and Updates:

    • Regularly update the MFA solution and monitor for new security standards. Ensure ongoing support and adaptation.

By following these steps, the organization can effectively implement a hybrid MFA solution that enhances security while integrating smoothly with existing infrastructure.