Active Directory
[http://en.wikipedia.org/wiki/Active_Directory] is
[Microsoft]'s implementation of, among other things,
[LDAP] services.



I like this
[http://www.microsoft.com/resources/documentation/WindowsServ/2003/all/techref/en-us/Default.asp?url=/Resources/Documentation/windowsserv/2003/all/techref/en-us/w2k3tr_adsrh_tools.asp]
reference to Microsoft's own AD Searches [[sic]] Tools.