Does an Attack of Opportunity occur when moving from a square within a hostile’s reach?

@mikemearlsDoes an AoO occur when moving from a square within a hostile’s reach to another square also within its reach? #dnd Does an AoO occur when moving from a square within a hostile's reach to another square also within its reach? #dnd

— Dominik Jarco (@TheCommanderDJ) December 2, 2015

@TheCommanderDJ no, only when moving from a space within its reach to one outside of it.

— Mike Mearls (@mikemearls) December 2, 2015