SAML not firing automatically

I've recently set up SAML on an Appian cloud instance. I've verified that it is invoking the IDP correctly...through the "test" functionality on the configuration screen. I also used a specific "group" to restrict which users are getting authenticated via SAML. When I try to go to an Appian page, I am presented with a logon page. I assumed that Appian would redirect the page request to the SAML IDP in order to authenticate, and the response back (with the SAML token) would then place me on the Appian page I originally requested. Am I missing something?

OriginalPostID-247693