Integrated autentication - look to other domain, not local domain for authentication

I have a web application that is mixed public / private (intranet).

Access to the Intranet folder is restricted by Integrated Windows Authentication. This works fine, except users already authenticated on the domain still get a prompt to enter their login info again for the intranet site, even though they are already authenticated on the domain.

Is there any way around this? The client does not wish users to have to enter their login information more than once, when they first log on to the network.

Windows 2003 server
IIS 6.0
app written in asp
LVL 1
lgdoAsked:
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oBdAConnect With a Mentor Commented:
On the client machines, check the following:
* Make sure that in the security settings for the intranet zone, "Automatic logon only in Intranet zone" is activated;
* Request the intranet website by using only the host name of your web server; if you have/want to use an FQDN instead, you have to specify the name in the intranet zone.

Internet Explorer May Prompt You for a Password
http://support.microsoft.com/?kbid=258063

How to Automatically Log on to IIS Using NT/Challenge Response
http://support.microsoft.com/?kbid=264086

Description of Internet Explorer Security Zones Registry Entries
http://support.microsoft.com/?kbid=182569
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lgdoAuthor Commented:
I should have been more explicit in my question - the client has 300+ machines, so making changes to IE on every one is not a happy solution.

Is there any way to change this on the server.

Thanks for the info, however, I had found this one out the day before.

If no one else posts I'll give you the points.
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