Number of recipients who unsubscribed in cube reports
How do I count the number of recipients who clicked the opt-out link (at least once) on an e-mail delivery? The cube report for Delivery and tracking statistics measure unsubscriptions as "sum @optOut". However, this does not measure the number of recipients who unsubscribed, but rather the sum of all clicks on the opt-out link (and for some reason some people seem to click this multiple times...). I have tried using "Distinct Count", but this also gives a wrong result (counting less than the actual number of recipients who unsubscribed).