This HOWTO describes how to integrate a Linux box into a Windows (Windows 2000 or 2003) ADS Domain, so that users can log in to the Linux box using their Active Directory credentials.
It's based on a Linux-based backup system which I've implemented for my teaching programme LAN (mostly Windows XP clients) at AIS. The system uses BackupPC running on a Fedora Core 4 box.
All the users of the network served by the backup server authenticate against a Windows 2003 Active Directory, and I wanted them to be able to use their ADS credentials to gain access to the backups of their Windows XP client (and their client alone) on the BackupPC server.


