Can you cast enlarge/reduce on a Sphere of Annihilation?

@andrewphillipc1 @JeremyECrawford @ChrisPerkinsDnD @Wizards_DnD @NerdarchyCan you cast enlarge/reduce on a sphere of annihilation? (DMG201) I would allow that – spell works on objects

— Mike Mearls (@mikemearls) March 21, 2016