when direct manager is resistant to deploy O3 with his own teams

dear michael

2 years ago I started to deploy O3 on a systematic mode with my direct manager and my boss,

as a result, my boss and all my manager have spontaneously deployed O3 with their teams

I have a resistant manager that I have not succeed in 2 years to convince 

I am convince this will help him in particular to develop with his own team, however still looking for a clue

what do you think I could do?

brg

ef31

great job guys, keep on going with your inputs