Troubleshooting Your Exchange Clusters
Topic Last Modified: 2005-04-15
Clustering provides a mechanism for moving resources between cluster nodes when problems occur. When a single server fails, clustering moves Exchange 2003 resources from the failed server to another server in the cluster. This failover allows services to remain available to users.
By maintaining service availability after a failure occurs, clustering gives you time to diagnose and fix the problem. Diagnosing means not only determining whether the failure is related to a single server or the whole cluster, but also whether the failure is easily repaired or requires more complex disaster recovery steps.