Microsoft Corp is considering Ericsson AB Chief Executive Hans Vestberg as a possible successor to outgoing CEO Steve Ballmer, Bloomberg cited sources briefed on the software giants executive search as saying on Wednesday. Bloomberg did not report on whether the company has reached out to Vestberg, who as CEO of the Swedish firm runs one of the worlds largest telecommunications equipment makers. Analysts have discussed potential candidates ranging from company insiders Satya Nadella and Tony Bates to several outsiders. But speculation refocused on internal choices this month after leading external candidate, Ford Motor Co CEO Alan Mulally, took himself off the list.