Stan,
Please make sure you have all the permissions and authentications set
according to the following article.
327843 Outlook Web Access Clients Cannot Log On
http://support.microsoft.com/?id=327843
Hope this helps.

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Greg Mansius [MSFT]
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> OWA was working a while ago, no changes have been made
> lately and now it keeps prompting for username and
[quoted text clipped - 4 lines]
> etc, it still keeps coming up and when it eventually does
> you get access denied. Tried your fixed so far and nothing
stan - 26 Apr 2004 13:29 GMT
tried that article and still get password and username
prompts even when page opens. to see messages I have to
input username and paswrod and domain and then still get
ac cess denied messages
>-----Original Message-----
>Stan,
[quoted text clipped - 17 lines]
>
>.
brm2a - 30 Aug 2004 20:01 GMT
Did you ever figure out what was wrong with your OWA? I have the sam
problem, and I followed all these articles, but it still prompts me fo
the Username and Password every time I access OWA.
The funny thing is that logging on as the Administrator works like
charm. In fact, once I log in as the Admin, it temporarily fixe
access for all other users.
I'm running out of ideas..
-
brm2
rob_maz - 19 Oct 2005 10:34 GMT
Hiya guys i know this was posted some time ago but has anyone solved
this problem, we are having the issue with the normal OL2003 client and
OWA.
Again it was working ok and then boom, prompting for evryone bar admin
people.
Any help would be geatly appreciated.
PS: we have exchange 2003 backend and win XP sp1, office 2003 on the
front end.
cheers,
rob
:)
--
rob_maz
Steven - 25 Oct 2005 20:58 GMT
Have you tried blowing out the tcp/ip stack on the client side? then
reinstalling it
> Hiya guys i know this was posted some time ago but has anyone solved
> this problem, we are having the issue with the normal OL2003 client and
[quoted text clipped - 17 lines]
> View this thread: http://www.mcse.ms/message598055.html
>