[jcifs] Authentication across multiple PDCs

[Jon Erdman]

I have a requirement to support single sign-on across mutliple PDCs.  The 
basic idea is that when I get the Type 1 message I pull out the domain, 
compare it to a map of domain name/domain controller pairs, and proceed with 
authentication.  I am testing this from Windows XP and 2000 boxes connecting 
to my webapp using IE 6.0. The webapp then performs the authentication.

I have this working for the most part, but the domain in the Type 1 message is 
optional.  In some cases the browser is not sending the domain.  Is there any 
way to form an additional request for this information?  If not, does anyone 
know of browser or machine settings that would cause the domain not to be sent?

Thanks,
Jon