Reinstalling Exchange over a Damaged Installation

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Reinstalling Exchange and any relevant service packs and hotfixes helps ensure that all Exchange files are intact and are the correct version. Reinstalling Exchange and any service packs stops Exchange services from running on the Exchange server during the install processes. Therefore, users cannot access the Exchange server until after the installations are complete. For detailed instructions, see How to Reinstall Exchange 2003 over a Damaged Installation.

Note

If you try to reinstall Exchange on a server that is running Exchange in a cluster, you must first move all Exchange Virtual Servers (EVSs) to another server node in the cluster. The node where Exchange is to be installed cannot be running any Exchange services.