title: AD vs ADFS vs LDAP: Explain it like I'm 5
body: <p>I don't work with Microsoft but I'm struggling understanding conceptually how AD, ADFS and LDAP work together.</p>
  
  <p>Let's say I have an application that needs an Identity Provider. How does AD and LDAP come into play?</p>
  
  <p>My googling hasn't come up with a clear summary of these concepts for me, but if there is a resource that exists, please do point me towards it.</p>