Wouldn’t you want to know what tech giants know about you? That’s exactly what Russian government hackers want, too. On Friday, Microsoft disclosed that the hacking group it calls Midnight Blizzard, also known as APT29 or Cozy Bear — and widely believed to be sponsored by the Russian government — hacked some corporate email accounts, including those of the company’s “senior leadership team and employees in our cybersecurity, legal, and other functions.” Curiously, the hackers didn’t go after cus...