Satan is subject to them

Bruce R. McConkie: Thus the probationary nature of man's second estate is preserved even during the Millennium. It is not that men cannot sin, for the power is in them to do so - they have their agency -- but it is that they do not sin because Satan is subject to them, and they are not enticed by his evil whisperings.

(The Millennial Messiah, pp. 668-669)