The users are redirecting to Service Portal local login page instead of SSO login.Issue If the SSO is enabled and the correct IDP is setup, then it should start working the same as the native platform. But the sp should not be set as public page.CauseThe probable cause of the issue could be the $sp sys_public is not set to public.ResolutionPlease go to sys_public.LIST and search for $sp under Page. Set the Active to true.Related LinksHow to skip local login page for Portal pages where SSO is configured Single sign-on, logins, and URL redirects