Outlook Web Access through ISA on internal LAN
- From: "JD" <jgd@xxxxxxxxxxxxxxxx>
- To: isalist@xxxxxxxxxxxxx
- Date: Tue, 14 May 2002 14:44:17 -0600
We have OWA on Exchange 2000 working very well for clients which access
the Exchange server directly using http:\\servername\exchange\. Have
followed all the instructions for publishing OWA through ISA to be found
on this site, including the usual alterations for 'basic authentication'
specifying the default domain in IIS, together with Integrated Windows
Authentication for our internal clients. The result is that external
clients can get ISA through our web site perfectly. All sounds fine.
However, if an internal client tries to access OWA as if it were an
external web site (ie going out through ISA and back in again) using
www.ourexternaldomainname.com/exchange (which works for external clients)
they get repeated authentication requests. The only exception is if they
specify an account with Administrative privileges on the ISA server. At
first I thought this was because the internal clients are trying to use
Integrated Windows Authentication, which ISA won't pass, but then I tried
only allowing basic authentication on IIS on the Exchange server and that
still gave the same problem.
I know it's not a mission-critical problem, but it does look to our staff
as if our OWA web-mail is not functioning when they are in work if they're
used to accessing it that way from home.
Any ideas would be greatly appreciated!
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