How to recover an Exchange 2007 cluster with the error “The installation on node is inconsistent” 1

Problem When you’re building (or already) have a active/passive Exchange 2007 cluster and you try to move the cluster to the other node, it’s possible you receive an error like this : The installation on node ‘NODE’ is inconsistent. ConfiguredVersion=, UnpackedVersion=8.2.176.2. An upgrade might not have completed successfully. As the error already explains, there is ...