Audit log
Outline automatically tracks all events related to account access, documents, and settings changes; including the IP address actor, and authentication type. Audit logs are currently retained for 1 year. Configuration of the retention period will be available soon.
Access
Workspace admins can access the audit log from Settings → Workspace → Audit Log, here you can browser recent events and filter them by event, IP address, or the actor name.

Filtering audit logs
API
Audit logs are also available through the API in the events namespace, please see the developer docs for more details on listing and filtering audit logs through the API.