Enable Field History Tracking for Users (Generally Available)

Easily manage and audit a user's data by viewing a list of changes to users. Track up to 20 fields on the User object to monitor updates made through the user interface, bulk operations, Apex, or the API. View a detailed log of changes, including the old and new values, a timestamp, and who made the update. You can also run reports to get valuable insights into user activity and improve your record management. This feature is now generally available.

Where: This change applies to Lightning Experience and Salesforce Classic (not available in all orgs) in Enterprise, Performance, Unlimited, and Developer editions.

How: From Setup, go to Object Manager, select the User object, and click Fields & Relationships. Then, select the fields you want to track (up to 20). You can view the tracking data on the user's access summary page.