Sets ChatIcon = 3 (policy) to remove the built-in Microsoft Teams 'Chat' icon from the taskbar and stop its background auto-start. Safe and reversible.
MaxTweaks applies this tweak with one click and snapshots your original setting first, so you can revert it cleanly at any time. A System Restore point is offered before batch changes, and every tweak links to its official source.
Get MaxTweaksOfficial documentation: https://learn.microsoft.com/en-us/windows/client-management/mdm/policy-csp-windowschat