Microsoft admitted that they have accessed a French Blogger’s private Hotmail account to identify a former Microsoft employee who had leaked the company’s trade secrets in 2012. Microsoft defined this private investigation as part of “Protecting our customers and the security and integrity of our products”, mentioned in the Microsoft’s terms of service, which says that the action was within the boundaries of the Electronic Communications Privacy Act. The indictment states, Kibkalo “not only leaked the secret screenshots of Windows 8, but also provided the information about. that helped the crackers to create a keygen for Windows 8 to bypass the authentication.
Source: https://thehackernews.com/2014/03/microsoft-admits-spying-on-hotmail.html