Settings > Audit log shows who changed what, and when: settings, the team, API keys and integrations, plus every record action your people took. Filter by person, by kind (Settings, team and access, or Record actions) and by dates; Show older loads more. Each line shows the person and, for settings changes, what changed and from which IP address.
Download CSV is part of Enterprise for carriers (free for fuel buyers) and needs two-step sign-in.