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Yes to all your questions. &nbsp;I found this discussion helpful:<br />
<br />
<a href="http://forums.isaserver.org/m_2002104613/mpage_1/key_/tm.htm#2002104613" rel="ugc">http://forums.isaserver.org/m_2002104613/mpage_1/key_/tm.htm#2002104613</a>
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Yes to all your questions.  I found this discussion helpful:

http://forums.isaserver.org/m_2002104613/mpage_1/key_/tm.htm#2002104613 [http://forums.isaserver.org/m_2002104613/mpage_1/key_/tm.htm#2002104613]

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Just a few Questions.<br />
<br />
Is Exchange 2003 compatible with ISA TMG 2010?<br />
<br />
Is Exchange 2003 OWA compatible with ISA TMG 2010?<br />
<br />
Can I Upgrade from ISA 2004 &nbsp;to ISA TMG 2010?<br />
<br />
Any issues or problems with the upgrades.<br />
<br />
<br />
<br />

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Just a few Questions.

Is Exchange 2003 compatible with ISA TMG 2010?

Is Exchange 2003 OWA compatible with ISA TMG 2010?

Can I Upgrade from ISA 2004  to ISA TMG 2010?

Any issues or problems with the upgrades.





Exchange 2003

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

An email client, email reader or more formally mail user agent (MUA) is a computer program in the category of groupware environments used to access and manage a user's email. A web application that provides message management, composition, and reception functions may internally act as an email client; as a whole, it is commonly referred to as webmail. Likewise, email client may be referred to a piece of computer hardware or software whose primary or most visible role is to work as an email client. Email clients can also have other systems, like calendars, notes and contact managers.

Email Clients

Microsoft Forefront, formerly known as Internet Security and Acceleration Server (ISA Server), is a network router, firewall, antivirus program, VPN server and web cache that runs on Windows servers. It includes identity management and protection systems, and discontinued systems for threat management and network protection, along with protection for Sharepoint and Exchange. The scope of discussions includes forward and reverse proxy, application and service publishing, virtual private networks (VPNs), outbound access rules, SSL certificates and network routing within either a single node or an highly-available array pairing.