In a recent project, do need to run the failover test for mailbox store/database at Exchange 2007. However, due to totally used to the UI on Exchange 2010 with the super easy DAG failover, therefore, in a short time, couldn't really locate where the exactly screen on Exchange 2007 Exchange Management Console (EMC) to run the CCR failover task for the mailbox store/database (in a CCR architecture).
Therefore, took me some times to search in the EMC and finally found it. Below are the screenshots that will lead you to perform the failover.
First, check the properties of the CCR cluster. Noticed that the Active DB and Quorum are located at node 1.
After that, right click again the CCR cluster, select "Manage Clustered Mailbox Server" from the right-click menu.
Wizard prompted, select the first action, which is "Move the clustered mailbox server to another node".