An e-Mail with subject "Active Administrator Notification: Active Administrator - Active Administrator Event Purged / Archived" from every AA instance arrives in our mailbox every night.
We have found that if we had a trial license these features would be enabled as part of the trial, and then when choosing for instance the AD Health-only license there is no way to disable these features later.
This is fixed in Active Administrator 8.8. In this version, any features you don't have a license for will be disabled by default.