I realized that I have no idea what the difference between "Authorization: DB or NT" means. The pre-existing help file says: "You can either select DataBase or NT Domain authorization."
DB authentication means the Snitz user is determined from the members table in the database. NT means the user is determined from the current NT user logged on the computer.
NT authentication is most applicable to an Intranet environment.
You didn't need to post in this very old topic. There is nothing wrong in making a new topic. If you noticed, it's 4 years old. Not to mention, if you searched in the NT Authorization forum, there are a number of topics explaining how to enable non-anonymous access on your server.