Reports
Two built-in reports for auditing activity and access. From Settings, click Reports.

Activity Report

Results show, per action: the user, date, IP address, the action taken (Update Asset File, Add Asset Archive File, and so on), and the asset affected with its full path. Click View on a row to open that asset.
Content Review Report

Choose one user, then click Find. The report lists every page and module post that user can access -- content name, type, when and by whom it was last modified, its path, and a link summary -- with Open on each row to jump to that item. Useful for confirming exactly what a given user's permissions grant them before or after a permissions change.