I have spent a few hours looking into this a while back, and I think I know the answer, from what I've seen SAML is no longer a supported protocol for SSO in the Umbraco backoffice (or .Net Core at all it seems) replaced by OIDC (quite rightly)... Has anyone got SAML working with the backoffice SSO? Happy to be proven wrong, but getting push back on the OIDC route for some enterprise clients