title: Is Microsoft.Owin.Security.ActiveDirectory for making Owin auth middleware that uses AD?
body: <p>I'm trying to understand the purpose of <code>Microsoft.Owin.Security.ActiveDirectory</code> and can't seem to find any documentation, tests, or even <a href="http://www.cloudidentity.com/blog/2013/12/10/protecting-a-self-hosted-api-with-microsoft-owin-security-activedirectory" rel="noreferrer">much</a> in the way of articles.</p>
  
  <p>What is this package actually for? I was trying to use it to create middlewear that authenticates against active directory and just can't seem to trace through what the parameters for <code>UseActiveDirectoryFederationServicesBearerAuthentication</code> actually do nor how to use them to point at my own AD server.</p>
  
  <p>What's going on with this package?</p>