So there's a registry DWORD that can disable the icon
Checked another account and it's greyed out but 'on', but the system tray icon is gone...
Looks like it's a 'Feature' that there's no genuine control over.
Looks like it's just a shortcut in the system tray to a website but that's irrelevant.
IM I should, at minimum, be able to remove all non-core features like MeetNow, XBOX, Your Phone, etc