'Microsoft Developing Web's Largest Advertising Network (SYS-CON Media) Microsoft Corp. today announced it has begun testing display advertisements across Microsoft(R) Office Live, Windows Live(TM) Mail and MSN(R) Spaces. The multimarket tests include advertisements from such global companies as Coca-Cola Brazil, JCPenney Co. Inc. and Monster Worldwide Inc. and mark the beginning of providing advertisers with broader access to Microsoft's valuable online audience.