That was after Paul repented and turned to God. The Lord is going to grind Michael into powder(Math. 21:44) if he doesn't repent.
That's what I mean...God used Paul after he repented...but the point is, God saved him. God CAN save Michael, too, as unbelievable as it seems. It's hard to pray for this guy...truly hard. But it's what we're told to do. Not for his success, but for his salvation, because it is a horrible prospect to land in the hands of an angry God.