29/07/2009
Microsoft and Yahoo! announced that they had made a ten-year deal in which the Yahoo! search engine would be replaced by Bing.
Yahoo! will get to keep 88 percent of the revenue from all search ad sales on its site for the first five years of the deal, and have the right to sell adverts on some Microsoft sites. Yahoo! Search will still maintain its own user interface, but will eventually feature "Powered by Bing™" branding. Microsoft and Yahoo! hold approximately 30 percent market share for searches combined.
All Yahoo! Search global customers and partners was expected to be transitioned by early 2012.