Upgrade Order\n
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  1. CAS
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  3. UM
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  5. HUB
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  7. EDGE
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  9. MAILBOX
  10. \n
\nUpgrade passive node first\nBrowse to the SP2 files setup.com /Mode:Upgrade\nrestart and wait for server to come back online\nLogin to the passive node and open Exchange Console\nStop-ClusteredMailboxServer Mailbox –StopReason “Upgrade to SP2”\nConfirm the state of the cluster is Offline\nNow we want to move the cluster\nMove-ClusteredMailboxServer Mailbox –TargetMachine Cluster2 –MoveComment “Upgrade to SP2”\nUpgrade CMS\nSetup.com /UpgradeCMS\nOpen Failover Cluster Management in the administrative tools and verify the status is online at this point\nUpgrade the primary node which is now the passive one\nSetup.com /Mode:Upgrade\nRestart the server you are now at SP2 for Exchange 2007\nMove the cluster back to your primary server\nMove-ClusteredMailboxServer Mailbox –TargetMachine Cluster1 –MoveComment “Upgrade to SP2”\n \n \n \n