Hi,

Some background information first...

• We have a single TMG 2010 server functioning purely as a web proxy server (single NIC configuration).
• We're using WPAD discovery through DHCP.
• We're currently migrating between two forests (single domain in each forest), source is AD 2003, target is AD 2008.
• There is a two-way trust between the forests.
• TMG Server is in the source domain.
• Both source and target domains are excluded from proxy (*.source.com; *.target.com as an example), and the option "Directly Access Computers In the Specified Domains Tab" is ticked.
• Target domain has Exchange 2010 SP3

The problem...

A Windows 7 client in the target domain (with IE 9 and Outlook 2010), fails Autodiscovery testing when 'Automatically detect settings' is enabled within IE. The WPAD.dat file shows the exclusion for the *.target.com domain, but when I turn on logging in TMG for the client, I can still see that traffic to the AutoDiscovery server is being proxied (though it is being allowed by an 'internal traffic' rule).

If however, I untick 'Automatically Detect Settings' in IE, and configure it manually (same proxy server), including an entry for *.target.com within the ''Do not use proxy for address beginning with", then the autodiscovery test works fine.

Any help is appreciated!

Thanks in advance

Tony

Hi,

Thank you for the post.

Please refer to this blog to configure multi-network WPAD: http://www.isaserver.org/blogs/pouseele/isa-corner/multi-networking-wpad-support-in-isa-2004-18.html

Regards,