Single sign-on (SSO) using an external identity provider compatible with their systems Implementing SSO with an external identity provider allows users to seamlessly and securely access both cloud and on-premises systems, providing a unified authentication experience. Option A is incorrect because local authentication in Tableau Cloud does not provide seamless integrationwith on-premises systems. Option C is incorrect as separate authentication for each system creates a disjointed user experience and increases the risk of security lapses. Option D is incorrect because manual authentication for each session is inefficient and does not provide the security and ease of access that SSO offers.