Using WSFederationAuthenticationModule with Classic ASP

I’ve recently been working with a client that is updating an existing Classic ASP application to ASP.NET MVC 5. As part of the upgrade, some of the systems currently hosted on an internal web server are being moved over to Windows Azure and the existing Windows Authentication in place, over to single sign-on (SSO) with Windows Azure Active Directory and Office 365, to leverage a cloud-based identity solution and minimise on-premises infrastructure.