Joseph Menn reports:
Microsoft said hackers working for the Russian government broke into its corporate networks two months ago and stole email from executives and some employees in its cybersecurity and legal departments.
Microsoft said in a late Friday blog post that it had detected the November breach on Jan. 12 and was beginning to notify staffers whose communications were intercepted.
It also disclosed the intrusion in a filing with the Securities and Exchange Commission, which last year began requiring public companies to do so within four days of determining that a breach is material, including when a reasonable investor would want to know about a potential impact on reputation or relationships with customers.
Read more at The Washington Post.