ADOTAS – Big news over at Microsoft: Kevin Johnson, the executive heading up Microsoft’s beleaguered online biz, is departing after 16 years with the company. He’s moving on to the chief executive slot at Juniper Networks.Johnson is getting out while the getting’s good: he was central in the failed negotiations to take over Yahoo and Microsoft’s chief, Steve Ballmer, is shaking up senior management in an attempt to play catch up with Google (and Yahoo) in the search/advertising arena. Microsoft is separating the two operations Johnson was responsible for – one unit will oversee online services (the company’s launched a [...] ...