NOTE: When we say "Exchange 2003 Standby Cluster" we are referring to the configuration discussed here:
With Exchange 2007 we have the ability to recover an Exchange cluster with the exsetup /recoverCMS switch. This is similar to the functionality we have with Exchange 2003 with the setup /disasterRecovery switch with a standalone system.
Note: In Exchange 2007 an Exchange Virtual Server is now called a Clustered Mailbox Server (CMS).
The steps to recover an Exchange 2007 Single Copy Cluster (SCC) or Cluster Continuous Replication (CCR) are the following:
For the Single Copy Cluster (could also be explained as "shared storage cluster"):
For the CCR Cluster:
For both cluster types you can create the new cluster with all new IPs and a new cluster name, but you must use the original CMS name. This cluster can be in a separate location (subnet) from the original cluster. This means you can have a cluster with the passive mailbox role installed and once you are in need to recover you can run the exsetup /recoverCMS switch to recover the nodes and then restore the databases. It is not possible to take an non-clustered mailbox server and recover as a SCC or CCR CMS. It is also not possible to have a SCC recovered as a CCR cluster or vice versa. It is however possible to use the database portability feature to move the databases between different types of clusters, if needed.
In addition, splitting clustered mailbox servers from a single cluster into many clusters or vice versa is also not supported as part of clustered mailbox server recovery.