Exchange 2007 SP1 is now fully supported when running on Windows Server 2008. As you probably heard, Windows Server 2008 has RTMed, and as such, is available to our customers through various channels. Here is a FAQ that can help answering some questions that might arise around this area.
Q: What exactly is supported?
A: Exchange 2007 SP1 is supported running on Windows Server 2008 RTM (and higher). Exchange 2007 RTM is not supported on Windows Server 2008.. Customers need to run the RTM version. Please see Exchange 2007 System Requirements for more information!
Q: Is Exchange 2007 RTM supported when running on Windows Server 2003 against Windows 2008 domain controllers?
A: Yes. Please see Exchange 2007 System Requirements for more information!
Q: If a customer is running Exchange 2007 SP1 on Windows Server 2003 or pre-RTM build of Windows Server 2008, can they in-place upgrade the OS to RTM version of Windows Server 2008?
A: No. We do not support Exchange Server if the OS has been in-place upgraded to Windows 2008 while Exchange was installed. Exchange Server will not function properly in that case. Please read this for more information.
Q: How can our customers move their Exchange Server 2007 (RTM or SP1) on Windows Server 2003 to a server running Windows Server 2008?
A: The documentation for this process is currently being finalized and will be available in Exchange 2007 online documentation within several weeks.
Microsoft, Exchange Server 2007, SP1, WS2008, Win2K8, Windows Server 2008, Support