http://msmvps.com/blogs/briandesmond/archive/2009/06/06/resuming-a-failed-exchange-2007-setup.aspxIf you've ever had Exchange 2007 setup fail partially, you've probably noticed that some of the components (maybe even the one it failed during) show up as installed, but, if you run the ExBPA (Best Practices Analyzer), it will probably complainenCommunityServer 2008.5 SP2 (Build: 40407.4157)