[Samba] New to Samba - General Question

[David Reta]

We are currently running a Windows 2003 Domain with Active Directory in Native Mode. I will be implementing a new Unix File Server that I would like accessabli via Windows. It has been some time since I've played with Samba and I know there are new features incorporated that allow interaction with newer windows domains. Before I get started should I be using security = server or security = ads?

Thanks,
David