If this policy is set to true, Accessibility options always appear in system tray menu.
If this policy is set to false, Accessibility options never appear in system tray menu.
If you set this policy, users cannot change or override it.
If this policy is left unset, Accessibility options will not appear in the system tray menu, but the user can cause the Accessibility options to appear via the Settings page.
When accessibility features are enabled by other means (e.g by a key combination), Accessibility options will always appear in system tray menu.