Restoring Exchange Server 2003 Clusters

The common restore processes that you would need to perform when restoring Exchange Server 2003 clusters are listed here:
Recover a server node in the cluster:
The Exchange resources of a failed cluster node are moved to another online node in the cluster. This basically means that the Exchange databases can continue to be accessed by the Exchange virtual server from the other node. If you need to remove the failed cluster node from the cluster and replace it with another node, you can use the process below as a guideline:
Using Cluster Administrator, evict the server node from the cluster.
Create and install the new server node.
Rejoin the node to the cluster
Install Exchange on the node.
Move the Exchange resources to this node.
Recover a cluster quorum disk resource:
You can use the process below as a guideline for recovering from a cluster quorum failure:
On each server node in the cluster, stop the Cluster Service.
Restore the system state data that holds the cluster quorum disk, using the Windows Backup utility.
Run the Clusrest.exe Resource Kit tool to restore the backup to the cluster quorum disk.
Recovering the shared disk resource that contains the Exchange databases:
Ensure that the Do Not Mount At Startup check box for the databases that you want to restore is selected, for the databases residing in the cluster.
Proceed to restore the Mailbox store form the backup.
Check that the databases have been mounted.
Check the content of the Event log.
Deselect the Do Not Mount At Startup checkbox for each database that is restored.