MS Exchange Server 2003 Question:
Can I upgrade Exchange 5.5 in place to Exchange 2003?
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Answer:
NO. In place upgrades to Exchange 2003 must already be Exchange 2000 SP3 and Windows 2000 SP3 or later. The only upgrade paths from 5.5 to 2003 are; an in place upgrade to Exchange 2000 then an in place upgrade to Exchange 2003 or the leap frog migration which requires another server.
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