Microsoft was breached in the massive suspected Russian campaign that has hit multiple U.S. government agencies, including those responsible for maintaining America's nuclear weapons stockpile, according to people familiar with the matter. The sprawling attack, which targeted critical government infrastructure using a Trojan horse hidden in network management software from SolarWinds Corp, also compromised broad swathes of the private sector, likely including most of the Fortune 500, it emerged on Thursday. Officials say the attack went undetected for nearly nine months, allowing the hackers free range in the affected agencies and companies, and that the true scale of the stolen...