Zscaler records the login name and IP address of every admin who logs in to the admin portal and changes policies or configuration settings. The Admin Logins tab displays the login and logout times, source IP addresses, and login names of all admins who logged into the admin portal. To view these records, go to Administration > Authentication > Audit Logs.
The login and logout times are in UTC. Calculate your local time by adding or subtracting the appropriate hour-offset.