??‘ For every site that has a Mailbox server, and has the necessity for Outlook 2007 or Outlook
Web Access client access, a CAS server must also be installed.
??‘ Forest Level Function: If cross - forest trusts or forest - to - forest delegation is used, the functional
level must be Windows Server 2003.
??‘ If free/busy information will be available to users in another forest, the functional level
must be Windows Server 2003.
??‘ If free/busy information is not required, the forest level must be Windows Server 2000
native or better.
??‘ Domain Functional Level: Windows Server 2000 native or better
??‘ Exchange Organization: Native mode
??‘ Exchange 5.5 Servers: Cannot exist in the same Exchange organization as Exchange Server 2007.
??‘ Cannot exist in the forest.
??‘ Exchange 2000: Exchange 2000 SP3
??‘ Exchange 2000 Post - SP3 rollup kb870540
??‘ Exchange 2003: Exchange 2003 SP2
Once all of the domain requirements have been satisfied, Schema preparation can begin.
Domain Preparation
When a scripted install is invoked for the first Exchange Server 2007 computer in the forest or domain,
several preparatory steps must be performed prior to the actual server install. The following list of setup
switches will extend the Schema, create new security groups, and confirm the presence of system objects.
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