SAML 2 integration with ADX Portal version

Hi,

We are trying to integrate with ADFS with SAML2.0. ( WS-Federation could not be used for our case ). 

We used Basic Portal template as a starting point and Master Portal solution as web site, deployment mode is onPremise.

Followed the steps detailed in https://community.adxstudio.com/products/adxstudio-portals/documentation/configuration-guide/portal-authentication/asp.net-identity-authentication/saml-2.0-provider-settings/,

Site configuration is done as below:

We can see the provider in the portal.

But once we login to ADFS and redirected back to portal we are getting 404.

We are using ASP.NET Identity Authentication ( authentication section is commented out from web.config )

Any help is greatly appreciated.