I am running the latest AD driver and am synching the email address to an AD domain from the vault. I am getting the message below when I am trying to initiate a sync to the AD domain. I have checked all of the obvious things....driver optimization to 'no', merge authority as vault, synchronize on the subscriber channel. The account does not exist in the domain but yet when I remove the email address only on the account in the vault, the message below is what I get in the trace. Any ideas?

ADFSCA ST:Start transaction.
13:22:08 66261700 Drvrs: ADFSCA STiscarding transaction because of optimization.