Kevin Miller just wrote a very informative post on failing over from a 2007 CCR cluster to the SCR target. I would recommend reading through it when you get the chance. The time to learn how to failover to your disaster recovery systems is before the disaster happens after all. 
There are two ways to configure the SCR failover:
- Standalone Server Configure the failover SCR server as a standalone mailbox server. When you will fail to it you run Move-Mailbox –ConfigurationOnly for all of the users in the failover database to tell users that they have moved to a new server. When Outlook 2007 connects to Exchange AutoConfigure will reconfigure Outlook to point to the new SCR server.
- Passive Cluster Node Configure the SCR failover sever as a passive cluster node. When you fail to it you run Setup.com /RecoverCMS and seize the Cluster name. There is no further user configuration needed after this.
For my test I used the second option and configured the SCR failover server as a passive cluster node. This was simple to do, all I did was pick Passive cluster node during setup and then configured SCR and I was good to go. The following sections cover the steps that I took to Fail to SCR, Fail Back to CCR then reestablish SCR.
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