I have an intranet site where we set custom subscriptions for some content types, and subscribe all users to these.
It happens that all subscriptions are unset overnight. Since subscribing/unsubscribing is not logged (whether done by the user or in users view bulk operation) there is no way to tell whether this is a DB/drupal problem or if someone is doing it.
Is there any way to log these events to the watchdog log ?
(subscribe/unsubscribe, and whether this is done bu the user himself or by an admin.)