Hi Everyone, We would like to apply Exchange 2007 SP3 in all our CCR clusters, and wonder if you can provide us with a doc or link step by step. Any suggestions, best practices, would be really appreciated. More than KB articles, we would like to know your experience in patching CCR cluster for Exchange 2007, and if you are aware of any know issues with SP3, please let me know

1. Install SP3 to the passive node first – make sure this works 2. Move CMS to passive node – make sure this works 3. Upgrade the CMS 4. Install SP3 to the other node 5. Move CMS back if you want For the finer points, read here: How to Upgrade a Clustered Mailbox Server in a CCR Environment Mike Crowley Check out My Blog!