There's currently a beta feature that allows someone to trigger on a sync activity when there's a sync error that was very helpful at my past company. It was a constraint on the Sync activity if I recall correctly. Having moved on to another company I was sad to learn that this was not GA yet. This is a functionality that Marketo has needed for years now, and I'd love to see this go GA - as it was very helpful at my former company. Thanks!
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