Windows Server 2008 potholes snag Exchange, in-place upgrades

From Network world

Users planning to run Microsoft Exchange on Windows Server 2008 and those contemplating
in-place upgrades of the new server operating system coming out next week may face
installation problems unless they heed specific advice from Microsoft.

The vendor is already warning users that the RTM version of Exchange 2007 cannot be
installed on Windows Server 2008 and that it is impossible to do an in-place upgrade to
Windows Server 2008 on a server running Exchange 2007 SP1.

Microsoft also has said "rolling upgrades" of failover clusters for Exchange are
impossible.

Microsoft has published three migration options, including one long set of steps around
off-loading data, uninstalling and reinstalling numerous Exchange components.

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Microsoft officials say in-place upgrades are not considered a best practice [for
Microsoft products] and that most large IT shops do thorough testing before deployment.
...

In addition, Hinrichs said Windows Server 2008 installs will likely [hopefully] be done
on new hardware or hardware wiped clean for new installs.
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