We recently ran a campaign promoting customers to update their subscription preferences, however a small number of contacts actually submitted the subscription management page (Click Dimensions entity) without selecting any preferences, so essentially opting out.
Is there a way I can query contacts where ALL related subscription preferences = Out?
So far, whichever way I've tried to do it, it always shows me those where at least one = Out (or does not = In).
Any help much appreciated!
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