Patching DAG Nodes in Exchange 2010
Face it, most Exchange administrators look forward to their weekly patching projects about as much as you and I look forward to our next trip to the dentist. Throw in the extra complications of switching from a non-clustered environment to one that is clustered and the word root canal comes to mind. When working with non-clustered servers one can usually just use WSUS or other patching products which require simple install patches and then a restart or a reboot of the windows box. If this is done in an Exchange environment with clusters however, the same process could end in disaster.
