The audit log: every search, view and export
Every sign-in, search (with its purpose), view, upload, download, export, review and settings change is written to a tamper-evident log. Rows can never be edited or deleted.
Read it
Open Audit log. The counters show searches this month and how many carried a recorded purpose, active users and how many have two-step sign-in, the retention rule and the encryption in use. Filter by user or action.

Tamper-evident
Each entry carries a hash of itself and of the entry before it. Verify chain recomputes every hash and reports the first break, if any. The database refuses updates and deletes on the table, and the app's database account cannot change it either.
Export
Export log downloads every entry as CSV with the hashes, so a reviewer can verify the chain outside Evidentor.
Views of subject profiles, documents and transcripts are logged too, so a firm can answer who looked at what and when.