https://www.cnbc.com/2017/10/09/microsoft-looks-at-whether-russians-bought-us-ads-on-search-engine.html

Microsoft said on Monday it was looking into whether Russians bought U.S. election ads on its Bing search engine or on other Microsoft-owned products and platforms, after rival Google said it had discovered such ads on its products.

A spokeswoman for Microsoft said in a statement in response to questions from Reuters that the company did not yet have any other information to share.