Microsoft Exchange Server 2007 and Windows Server 2008
The release to manufacturing (RTM) version of Exchange 2007 cannot be installed on Windows Server 2008. However, Exchange 2007 Service Pack 1 will be supported for installation on Windows Server 2008.
While you cannot install Exchange 2007 RTM on Windows Server 2008, Exchange 2007 RTM will be supported with Windows Server 2008 RTM domain controllers. Exchange 2003 Service Pack 2 will be similarly supported: Exchange 2003 cannot be installed on Windows Server 2008, but will be supported with Windows Server 2008 domain controllers.
Please see below for more details and for information about support for pre-release versions of Windows Server 2008 with Exchange.
Exchange Server and Windows Server 2008 Directory Servers
The following outlines the supported configurations for Exchange 2007 and earlier versions with the RTM version of Windows Server 2008. For customers running pre-release versions of Microsoft Exchange or Windows Server as authorized participants in the a Technology Adoption Program for Microsoft Exchange or Windows Server, current builds of Windows Server 2008 and Service Pack 1 (SP1) for Exchange 2007 are also supported as described below.
Upgrading Exchange 2007 from Windows Server 2003 to Windows Server 2008
When upgrading standalone servers, it is not supported to upgrade your operating system to Windows Server 2008 and then upgrade Exchange 2007 to SP1. It is also not supported to upgrade Exchange 2007 to SP1 and then upgrade your operating system to Windows Server 2008. To deploy Exchange 2007 SP1 on Windows Server 2008, you must install Windows Server 2008 on a computer that does not have Exchange installed, and then install Exchange 2007 SP1.
For clustered mailbox servers, Exchange SP1 introduces support for clustered mailbox servers running on Windows Server 2008. However, as a result of the significant changes introduced in Windows Server 2008 failover clusters (called server clusters in previous versions of Microsoft Windows), rolling upgrades of a failover cluster from Windows Server 2003 to Windows Server 2008 are not possible. Therefore, to upgrade a clustered mailbox server from Windows Server 2003 to Windows Server 2008, you must build a new failover cluster using Windows Server 2008 as the operating system for all nodes, and then migrate the data from the old cluster to the new cluster. You can use the Move Mailbox operation to move mailboxes from the old cluster to the new cluster, and you can use public folder replication to move any public folder data from the old cluster to the new cluster.
Known Issues with Exchange Server and Windows Server 2008
The following are known issues when combining legacy versions of Microsoft Exchange with Windows Server 2008:
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