HP StorageWorks Storage Mirroring Recover User's Guide (T5437-96008, November 2009)

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Note:
HP recommends that the Exchange version be the same as the operating
system version (for example, Windows Server 2003 running Exchange
2003).
The source and target servers must both be running a Microsoft-supported
operating system/Exchange combination.
Both source and target Exchange versions must be identical.
To perform target data verification, you must be using Exchange 2003 with
service pack 1 or later.