How do I set up windows authentication? (for non-experts)

This link (http://www.jetbrains.net/confluence/display/TCD4/Authentication+Settings) is good for people who know what they're doing, but I'm a little lost because I don't know a lot about active directory/ldap and because it's been a few years since I've used java.

Could you provide some simple steps for setting up windows authentication with TeamCity?  I want users who are able to log into a domain do so by just providing the user id and password, with the domain name defaulted to something I specify (i.e., COMPANYNAME).  I don't want these users to be able to log into the TeamCity server.