title: What is the relationship, if any, between Active Directory groups and groups in Exchange?
body: <p>Tasked with creating a login page that would allow members of two specific groups access to some controllers and actions in an MVC project, I set about to create a role provider for AD. I managed to get it configured with forms authentication, and to enumerate the groups to which an authenticated user belongs in AD.</p>
  
  <p>It turns out, however, that the groups I was asked to set this up for, are not AD groups. I see lots of groups, but not the ones in question.</p>
  
  <p>The request was based on the fact that these groups show up in the global address book from Exchange, but there doesn't seem to be a 1:1 relationship.</p>
  
  <p><strong>Is there <em>any</em> relationship?</strong></p>