Multi-Organizational sign-in with WsFederation owin middleware

This is the first of three blog posts on how we can use Windows Azure Active Directory in our web apps to empower our self. First Microsoft.Owin.Security.WsFederation is covered and how to sign into our WAAD, and how we can allow 3th party companies to sign up for our WAAD web app, so we can have multi organizational signin for targeting the B2B market. Second will be about asking for profile info from WAAD so you can get info about the customer that has signed in. Third will be about talking with windows azure management api from our web api to deploy and make changes to the customers windows azure subscription.