I’ve noticed a couple of issues with the resolved status within the reports;
If you archive emails straightaway the “activity over time” report doesn’t class as resolved. Wouldn’t it be better to class Archived and Closed as the same in this regard? (Important note: if you close them first and then archive then this section of the report still treats them as closed)
The “Mailbox Activity” and “User Activity” Average resolution time and number resolved chart only counts emails as resolved while they stay in the “closed” section. As soon as you archive them they no-longer count towards these graphs.
If you re-open a previously closed card, it’s still classed as closed in the “Activity over time” graph.