We have webapplication extended to provided windows auth on one zone and SAML Auth using ADFS on second zone. We have SharePoint servers let's say on Contoso.com and users are Foo.com domain. This Foo.com domain has ADFS server configured for SAML authentication. My question is can i use same Foo.Com users for windows authentication meaning same domain users login using different authentication providers ? If yes , what should be direction of one way trust between domains ?