Attributes for Active Directory Users

 Useful information if you want to script or query AD for user's specific information

http://www.selfadsi.org/user-attributes.htm

Attributes in the administrational GUI tools

From this point, you can jump to the enumeration of the AD user attributes in the regarding administrational GUI tools:

Windows 2008 AD Users and Computers	Windows 2000 / Windows 2003 AD Users and Computers	Exchange 2003 AD Users and Computers
Exchange 2007 Exchange Management Console	Services for Unix AD Users and Computers