[Zope] NT User Folder use and security

Hi all, I'm testing JC NT UserFolder (with Igor Leturia import NT groups) for my Intranet on my Zope 2.5b2 on win2kpro, and I have two questions: 1) I have created a NT User Folder with domain MyDomain, my NT domain, but the only users that I see in folder are the local users (my workstation administrator etc). Is it ok? Importing domain users in local users is the correct workaround? 2) The second question is about security: if Zope users login with Domain Password, these password go on the lan without encryption? If so, is this secure? I'm very confused about this. Thank you. Michele