Upgrading the Exchange 2007 single copy cluster requires a bit changed steps than in previous Exchange Server's releases. You still have to work on a passive node tough :))) I suggest that you run Microsoft Update on all nodes prior to Exchange SP1 install. The most important part is .NET Framework 2.0 SP1 update, since Exchange is .NET Framework application! The change from previous versions is that there is no GUI for updating the cluster. You have to do the upgrade from command prompt. Let's presume that our nodes are named NODE1 and NODE2. Steps are as follows: On NODE2 Move all cluster groups to NODE1 if they are not already active on NODE1 Put Windows Firewall/Internet Connection Sharing (ICS) service to manual and then START IT, since Setup will add Windows Firewall exceptions for Exchange services Stop any services that have open handles to performance counters (Performance Logs and Alerts and any Microsoft Operations Manager agents), since performa...
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