Install Windows 2003 Ent x64
Install all Windows Updates - reboot
Check for more Windows Updates - reboot
Run Exchange 2007 setup.exe
MailFlow Settings - <Your old Exchange 2003 Server Name>
Readiness Check - all green? - click install
click yes - reboot - run the setup.exe again to Get Critical Updates for Exchange 2007
- mine found Update Rollup 9 for Exchange Server 2007 Service Pack 1 (KB970162)
install Resource ToolKit
Open IIS - change directory security so that it does not require 128-bit encryption
Open Exhcange MMC - Server Config > Client Access - Properties of OWA
- - set the internal and external URLs - make sure that the S from the https has been removed.
- - The internal one I set for http://servername.domain.net/owa
- - The external one I set for http://owa.publicdomain.com/owa
After this part, you're ready to configure your proxy server to handle the incoming traffic to OWA and direct it to your new Exchange Server.