In CyberArk Privilege Cloud, Multi-Factor Authentication (MFA) can be configured to enhance security by requiring multiple methods of authentication from independent categories of credentials to verify the user's identity. The available authentication methods include:

Windows Authentication: Leverages the user's Windows credentials.

PKI (Public Key Infrastructure): Utilizes certificates to authenticate.

RADIUS (Remote Authentication Dial-In User Service): A networking protocol that provides centralized Authentication, Authorization, and Accounting management.

CyberArk: Uses CyberArk's own authentication methods.

LDAP (Lightweight Directory Access Protocol): Protocol for accessing and maintaining distributed directory information services.

SAML (Security Assertion Markup Language): An open standard that allows identity providers to pass authorization credentials to service providers.

OpenID Connect (OIDC): An authentication layer on top of OAuth 2.0, an authorization framework.

Reference for this can be found in the CyberArk Privilege Cloud documentation, which details the integration and setup of MFA using these methods.