Hi Scott, I have checked and confirmed that Shibboleth is registered in both ISAPI Filters and Handler Mappings (AboMapperCustom-82031). -- View this message in context: http://shibboleth.1660669.n2.nabble.com/Getting-404-on-Shibboleth-sso-SAML2-POST-tp7594633p7594644.html Sent from the Shibboleth - Users mailing list archive at Nabble.com.