A data administrator is configuring authentication for a SaaS application and would like to reduce the number of credentials employees need to maintain. The company prefers to use domain credentials to access new SaaS applications. Which of the following methods would allow this functionality?

Single Sign-On (SSO) allows users to authenticate once with their domain credentials and gain access to multiple independent software systems, including SaaS applications, without needing to re-enter credentials. This directly addresses the goal of reducing the number of credentials employees need to maintain and leveraging existing domain credentials. LEAP (Lightweight Extensible Authentication Protocol) and PEAP (Protected Extensible Authentication Protocol) are authentication protocols primarily used for network access control (e.g., Wi-Fi) and are not designed for federated identity management across SaaS applications. MFA (Multi-Factor Authentication) enhances security by requiring multiple verification factors but does not reduce the number of credential sets or enable the use of domain credentials across different services; it adds to the authentication process, rather than simplifying credential management across multiple applications.