At this stage, the binaries for SP1 have been applied to Node2 and the AD objects for the EVS have been updated to show the EVS as running SP1. You can verify these changes by running Exchange System Manager (ESM) and viewing the EVS's build version, as Figure 2 shows. Exchange 2003 SP1 has build number 7226.6.
Node1 is still running an earlier build of Exchange, so you can't move the upgraded EVS to that node. If you attempt to do so, you'll get the error message Version of Exchange on this machine does not match the version of Exchange server NodeName. Apply hotfix 831464 to Node1 and reboot. When Node1 comes back online, apply Exchange 2003 SP1.
To confirm that the upgrade was successful, move EVS1 back to Node1 and verify that Exchange starts correctly on that node. As it is in Exchange 2000, this failover operation is optional because all nodes in the cluster are running at the same revision level, but it helps to verify that everything is installed correctly. . . .
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