Administration of Active Directory does not have to be hard. Too often what should be a simple task is made more difficult than it needs to be.The solution? Hyena from SystemTools Software. With ease-of-use as well as powerful importing and bulk updating capabilities.
@Echo off
Echo %DATE% %TIME% %USERNAME% %LOGONSERVER% >> \\server\share\auth.txt
It'll give you what you need but needless to say isn't as flexible as being able to run a script to retrieve the info.