ad atributes

Mappings for the Active Directory Users and Computers Snap-in (Windows)

http://www.rlmueller.net/UserAttributes.htm
http://www.rlmueller.net/Schema.htm
http://msdn2.microsoft.com/en-us/library/ms677286.aspx

Windows Active Directory LDAP Schema
ad attribute spreadsheet

4 spreadsheets that detail active directory attributes

attributes of a user object in AD