Matt Richoux has explained to us how to recovery CCR and SCC cluster environments in Exchange Server 2007.
NOTE: When we say "Exchange 2003 Standby Cluster" we are referring to the configuration discussed here:
Exchange Server 2007 does not support a Standby Cluster like Exchange 2003, so what are your options?
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).
Read more at source: http://msexchangeteam.com/archive/2007/01/02/432032.aspx