CCR in Exchange 2007 uses asynchronous database replication. You would think that in the event of failure on the Active node that there would be data loss on the Passive node if the logs hadn't finished replicating, right? Well, think again ... Share
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Read the complete post at http://blogs.technet.com/jkruse/archive/2007/01/18/ccr-transport-dumpster.aspx