Chrome device settings required for user and session activity reporting

Chrome Gopher offers user and device reporting, which relies on the capture of user login and session data. In order for this data to be available, your managed device settings for User Data must be set to “Do not erase all local user data”

Google's Chrome OS documentation also offers the following settings recommendations:

SettingWhat it monitors
Active Times Shows up to the last 15 days of activity on the device, including when it was last used and for how long. The times and dates shown are based on the time zone of the device. You can turn this feature on in the Admin console at Device management > Chrome management > Device settings > Device State Reporting.
Recent Users Displays the last users of the Chrome device. Public, kiosk, and guest-mode sessions are not reported. Email addresses for unmanaged users are not displayed; instead these display as "User not managed by your domain". You can turn on this feature in the Admin console at Device management > Chrome management > Device settings > Device User Tracking. At this time, only users under the same domain that a device was enrolled in will be shown.