Authenticating Debian & Samba to Active Directory 
- This walkthrough is designed to give instructions for configuring Linux servers/clients to authenticate to Active Directory. The purpose is to join a Linux samba server and a Linux client to an existing AD structure. The samba connects seamlessly for Windows and Linux users alike. The walkthrough is broken into two sections and is available in via the links below.
Linux Samba Configuration:
http://wiki.debian.org/JohnJacob
Linux Client Configuration:
http://wiki.debian.org/Authenticating_Linux_With_Active_Directory