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You Exchange 2003 will work on 2003, or 2003 R2 but not Windows 2008 as Exchange requires IIS 6, SMTP and NNTP.<br />
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Windows 2008 uses IIS 7 , includes SMTP but does not support NNTP. So it is incompatible.<br />
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Exchange 2007 is supported on Windows 2003 64 bit or later.
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You Exchange 2003 will work on 2003, or 2003 R2 but not Windows 2008 as Exchange requires IIS 6, SMTP and NNTP.

Windows 2008 uses IIS 7 , includes SMTP but does not support NNTP. So it is incompatible.

Exchange 2007 is supported on Windows 2003 64 bit or later.

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You can also install a special version of the Exchange Management Tools on Windows Vista or Windows 7 &nbsp;(need to extract msi from exe, to do this):<br />
<a href="http://www.microsoft.com/en-us/download/details.aspx?id=17836" rel="ugc">http://www.microsoft.com/en-us/download/details.aspx?id=17836</a>
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You can also install a special version of the Exchange Management Tools on Windows Vista or Windows 7  (need to extract msi from exe, to do this):
http://www.microsoft.com/en-us/download/details.aspx?id=17836 [http://www.microsoft.com/en-us/download/details.aspx?id=17836]

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I am installing a 2nd server in our Exchange 2003 organization. Does this server have to be the same OS as our first server? Currently, they are both running on Windows Server 2003 and would like to update to 2003 R2 or 2008.<br />
Thank You
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I am installing a 2nd server in our Exchange 2003 organization. Does this server have to be the same OS as our first server? Currently, they are both running on Windows Server 2003 and would like to update to 2003 R2 or 2008.
Thank You

Exchange 2003 - Install 2nd server in org on different os?

Windows Server 2003 was based on Windows XP and was released in four editions: Web, Standard, Enterprise and Datacenter. It also had derivative versions for clusters, storage and Microsoft’s Small Business Server. Important upgrades included integrating Internet Information Services (IIS), improvements to Active Directory (AD) and Group Policy (GP), and the migration to Automated System Recovery (ASR).

Windows Server 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.