* Access the Google Admin Console: Sign in to the Admin console using your ChromeOS administrator credentials.
* Locate User Settings: Navigate to "Device Management" > "Chrome Management" > "User & browser settings".
* Find Incognito Mode Policy: Within the settings, search for "Incognito mode".
* Disable Incognito Mode: Select the option to "Disallow incognito mode".
* Save Changes: Click "Save" to apply the policy to the designated users or organizational units.
References:
* Set up Chrome browser on managed devices:
https://support.google.com/chrome/a/answer/3523633?hl=en