Updated: July 11, 2020 (January 15, 2007)
SidebarUpgrade and Migration Issues
Even when the costs of the software licenses are factored out, upgrading from Exchange 2000 or 2003 to Exchange 2007 is significantly more difficult and expensive than the upgrade from Exchange 2000 to Exchange 2003. The two main reasons for this are Exchange 2007’s 64-bit requirement and new message-routing architecture. Furthermore, because Exchange 2007 drops support for Outlook Mobile Access (OMA), an Exchange 2003 feature that provides browser-based access to Exchange from data-enabled mobile phones, customers who depend on that feature will have to include that consideration in their upgrade decision.
While the added cost and complexity of upgrading will likely slow adoption of Exchange 2007, the organizations that forge ahead will likely provide Microsoft’s Exchange specialist partners with lucrative service opportunities.
No In-Place Upgrade
All Exchange 2007 server roles require an x64 server running the 64-bit Standard, Enterprise, or Datacenter Edition of Windows Server 2003.
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