If you are programming in C#, you can access information held on Active Directory easily using the code below.
Below uses the libraries provided in DirectoryServices namespace to query the Active Directory such as a user's telephone number, email address, etc. As you can see, it is very straight forward (at least compared with tutorials I have seen using LDAP)
= principal.GetUnderlyingObject() as
System.DirectoryServices.DirectoryEntry; %>
<%: principal.DisplayName %>
Tel: <%: directoryEntry.Properties["telephoneNumber"].Value%>
Email: <%: directoryEntry.Properties["mail"].Value%>
Although it looks like classes in DirectoryServices are wrappers to equivalent LDAP calls, it is certainly a lot cleaner and easier to understand (in my opinions)
The full list of properties you can retrieve can be found on
