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Prep for Exchange and prep for Windows 2003 R2 are different things. The fact that you have installed Exchange 2007 has no bearing on prep for R2.<br />
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Simon. 
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Prep for Exchange and prep for Windows 2003 R2 are different things. The fact that you have installed Exchange 2007 has no bearing on prep for R2.

Simon.

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This is a follow up to<br />
<a href="https://www.experts-exchange.com/questions/22481680/Windows-2003-Standart-license-swap-with-windows-2003-R2.html" rel="ugc">https://www.experts-exchange.com/questions/22481680/Windows-2003-Standart-license-swap-with-windows-2003-R2.html</a><br />
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Trying to upgrade from 2003 standart to R2. I have 3 DC.<br />
when insert second R2 CD promted for the key and then getting a pop up saying that I have to first run<br />
adprep from R2 CD on the chema master DC first.<br />
I already have Exchange 2007 installed and ran adprep for it. What happend if I ran adprep from R2 now?<br />
can I get into trouble with it?
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This is a follow up to
http://www.experts-exchange.com/OS/Microsoft_Operating_Systems/Server/Q_22481680.html

Trying to upgrade from 2003 standart to R2. I have 3 DC.
when insert second R2 CD promted for the key and then getting a pop up saying that I have to first run
adprep from R2 CD on the chema master DC first.
I already have Exchange 2007 installed and ran adprep for it. What happend if I ran adprep from R2 now?
can I get into trouble with it?

exchange 2007 and R2 adprep

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

Active Directory (AD) is a Microsoft brand for identity-related capabilities. In the on-premises world, Windows Server AD provides a set of identity capabilities and services, and is hugely popular (88% of Fortune 1000 and 95% of enterprises use AD). This topic includes all things Active Directory including DNS, Group Policy, DFS, troubleshooting, ADFS, and all other topics under the Microsoft AD and identity umbrella.

Active Directory

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.