Sadly, as much as I’ve used different flavors of Linux, and enjoyed playing around with them, I’ve never really gotten far enough to join my linux machine to a windows domain, and actually use it as a server.

This is a great writeup on how to do just that.

http://www.schooltechnician.co.uk/knowledge_base/linux/turning_your_linux_box_into_a_windows_compatible_server.html