Troubleshooter: Updating Clustered Exchange Servers

I tried to install a service pack on my clustered Exchange servers. I failed over the first node's virtual server to another node and installed the service pack. Why, when I try to fail the virtual server back, do I receive a message saying that the versions of Exchange on the nodes don't match?

The message you received is actually a safety measure that prevents you from failing over a virtual server to a node that has a mismatched version of Exchange. In this case, the trick is to run the cluster administrator tool from the updated nodeā€”use the tool to trigger the failover, and you should be in good shape.

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