Which solution provides single-on (SSO) capabilities across multiple identity providers?

The correct response highlights the role of federation in enabling single sign-on (SSO) capabilities across various identity providers. Federation is a technology that allows multiple organizations or domains to share authentication and authorization information. This means that users can authenticate through one identity provider and gain access to resources across other partner providers without needing to log in again.

This approach benefits organizations by enhancing user experience, simplifying management, and improving security. It enables seamless access to services and applications that are hosted on different platforms while maintaining secure and trusted identity assertions.

Other choices, while related to identity management, do not provide the same federated SSO capabilities. For instance, a domain controller primarily functions to manage user accounts, enforce security policies, and manage resources within a network but does not inherently facilitate cross-organization SSO. Active Directory Domain Services provides a foundation for managing identities but itself does not directly support federation with external identity providers. Azure Active Directory Privileged Identity Management focuses on managing and controlling privileged user access, which is important for security but does not specifically address the broader concept of providing SSO across different identity systems.