Adds an additional layer of security by requiring users to provide two or more verification factors to access their accounts. It supports various authentication methods such as one-time passwords (OTP) over SMS, push notifications, YubiKey, TOTP, and Google Authenticator. The solution includes adaptive authentication policies, which can restrict the number of devices users can access services on and provide location-based access control. It also offers notification options for challenges, completed device registrations, and failed attempts. The purpose is to enhance security by requiring multiple forms of verification, making it more difficult for unauthorized users to gain access even if one factor is compromised.