The question originally asked about SAML Active auth using WS-Trust, but you answers with a link for SAML Passive auth with WS-Fed. However, your answer does seem to imply that WS-Trust is supported. Can you please clarify your answer?
I'd like to ask this question as well. We just ran into this roadblock with Azure SQL authentication, and Microsoft publishes a guide to configure it in ADFS. https://blogs.technet.microsoft.com/pauljones/2016/02/08/how-to-setup-azure-sql-integrated-authentication/