RE: OWA 2000 - Logon Problems when client is behind proxy and/or ISA

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From: Michael C58 (C58_at_discussions.microsoft.com)
Date: 11/18/04 

Date: Thu, 18 Nov 2004 13:49:01 -0800

I had problem number 4 below (Sometimes you will get a completed inbox but
you cannot reply to an email) after I applied Post SP3 rollup (KB870540).

First I found that the SP had reset a number of website authentications from
Basic to Integrated. I fixed that by fixing the IIS settings on the servers
so users would not be asked for a domain when using OWA.

Then I found that I could not reply to a message or forward a message in
OWA, and I found that when I clicked the To or From buttons, there was no
repsonse. I used KB842238 and what happened was that it fixed the problem
behind my ISA server, but not in front of it. I even tried putting in a
front-end Exchange server - again it worked inside my network, but not
outside (not via ISA). I also have run the second version of the KB888258
patch on the ISA server.

Any suggestions would be greatly appreciated. You never really know how many
people use OWA until it breaks!

"Bob G." wrote:

> I only have this problem when attempting to use OWA from a client pc behind a
> proxy server and/or ISA Server:
>
> 1: Logon Box repeatedly asks for password many times.
> 2: Sometimes you will get an empty inbox and is states "Loading..."
> 3: Sometimes you will get an "Access is Denied" error.
> 4: Sometimes you will get a completed inbox but you cannot reply to an email.
>
> Configuration:
>
> Server side: SBS 2000 Server w/ Exchange 2000 and SP3 and also Post SP3
> rollup (KB870540)
> Client Side: Win2000 or Winxp with IE V5.5 or V6 and client is behind some
> sort of proxy server (unknown - happens at some hotels w/ broadband internet)
> or behind an ISA Server 2000 running on either SBS2000 or SBS2003.
>
> Other than this particular situation, OWA Works fine. I have multiple
> customers running SBS 2000 and all seem to have this problem when testing
> from behind any ISA 2000 Server acting as both a firewall and as
> caching/proxy.
>
> I have also done some research and some tech articles say to disable
> Integrated Authentication in IIS for EXCHWEB. This does not appear to have
> any effect.
>
>
> Any help would be greatly appreciated.
>
> Thx
> Bob G.
>
>
>

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