Microsoft: Russian-backed hackers targeting cloud services

In this April 28, 2015, file photo, a man walks past a Microsoft sign set up for the Microsoft BUILD conference at Moscone Center in San Francisco. (AP Photo/Jeff Chiu, File) In this April 28, 2015, file photo, a man walks past a Microsoft sign set up for the Microsoft BUILD conference at Moscone Center in San Francisco. (AP Photo/Jeff Chiu, File)