Setting the policy to True turns the large cursor on at the sign-in screen. Setting the policy to False turns the large cursor off at the sign-in screen.
If you set the policy, users can temporarily turn the large cursor on or off. When the sign-in screen reloads or stays idle for a minute, it reverts to its original state.
If not set, the large cursor is off at the sign-in screen. Users can turn it on any time, and its status on the sign-in screen persists across users.
Note: DeviceLoginScreenLargeCursorEnabled overrides this policy if the former is specified.