There is no one magic solution to a problem that can be so personal. For what activates one does nothing to trigger another’s engagement. For me personally Trust is at the core of everything I do and unfortunately, in the workplace trust is finite. To engage the disengaged I would build trust in the team. Offer support to those that need it, accept accidents for just that, work together to constantly improve and most important, never recognize just one as we are only as strong as the weakest link.