[robinj6]

You would download and run this on a Node server. It then uses LDAP to talk to Active Directory, and exposes a Javascript library to make that talk simple.

[delinka]

I don't think the server part is necessary. Regardless of where you run it, it relies on ldapjs to talk LDAP to Active Directory.

[youdontknowtho]

LDAPJS is neat. You can actually run an LDAP server in NODE. I haven't played with it too much, but that's one of those things I just didn't think I would see.