Hide Delete, Archive, Report Spam Buttons in GMail
This extension Hides Delete, Archive and Report Spam Buttons in GMail, so users cannot delete the email.
You can install this extension using Group Policy Editor in Windows or similar in Mac to prevent users from disabling it, if you want:https://www.chromium.org/administrators/policy-list-3#ExtensionInstallForcelist
Command to add is :
Then users can neither disable this extension