Reuters exclusively reported that EU antitrust regulators are asking Microsoft’s (MSFT.O) rivals and customers whether they are affected by the U.S. tech giant’s proposals to gain UK approval for its $69 billion acquisition of Activision Blizzard (ATVI.O). The European Commission had cleared the deal in May after Microsoft agreed to license popular Activision games such as “Call of Duty” to rival game-streaming platforms.That clearance was given before Microsoft proposed the Ubisoft deal to appease the UK regulator.