Continuously Being Prompted For Credentials

[Paul Foote]

Good day to everyone.

The best way to describe the problem is to provide all the
facts.

Operating System: Windows XP Pro SP1
Browser: Internet Explorer 6 with SP1 and all recent
patches
Machine is member of domain with Small Business Server 2000
Internet access is via ISA Server
Primary User is member of local (Machine) Administrators
Firewall Client is also running

If primary user of computer connects to a web page via
Internet Explorer, he is constantly prompted for domain
credentials. If he opens up his browser three (3) times
within a day, his domain account ends up getting locked.
It is if his machine is passing on his credentials to the
ISA Server, but they are incorrect.

If the network domain administrator uses the same machine,
he is able to connect to the Internet without any
prompting.

All other workstations on the same local network and
domain are all configured the same (XP Pro SP1 running IE
6, connecting to same SBS Server and through the ISA
Server) do not experience these same problems.

Obviously the problem that I am trying to overcome to find
a way to get his browser to pass his networkmcredntials
through the ISA server without having to be prompted each
time.

Any assistance would be appreciated. Thanks.

PAUL

 

[H Leboeuf]

Is this the fix?

Internet Explorer Always Prompts for Authentication When Browsing to Web
Sites Already Logged on to
When you connect through a caching ISA Proxy that has anonymous access, and
you try to perform a NT LAN Manager (NTLM) Authentication with an IIS4 or
IIS5 Web server, Internet Explorer 6.0 may not automatically authenticate
with NTLM pre-authorization (PreAuth). Instead, you may be continually
prompted to authenticate.
http://support.microsoft.com/?kbid=820780 (i. e. 6. W98/se/ME/NT4/2000/XP
9/19/2003)