https://www.recode.net/2017/10/9/16450320/microsoft-2016-presidential-election-russia-bing-investigation >Microsoft is currently reviewing its sales records to determine whether trolls aligned with the Russian government purchased ads on Bing or other company products during the 2016 U.S. presidential race. >The decision to conduct an internal investigation comes as Microsoft’s tech industry peers — Facebook, Google and Twitter — contend with parallel probes by the U.S. Congress into the extent to which Kremlin-backed agents spread disinformation on their platforms around Election Day.