Microsoft to buy back up to $60 billion in shares; names Brad Smith vice chairFILE PHOTO: A Microsoft logo is seen in Los Angeles MSFT +0.94% (Reuters) -Microsoft Corp on Tuesday said it will conduct an up to $60 billion share buyback program, raise its quarterly dividend by 11%, and appoint company President Brad Smith as vice chair.Microsoft said the buyback program has no expiration date and may be terminated at any time, and that it would pay a dividend of $0.62 per share - 6 cents over the previous quarter.The U.S. technology giant also called the vice chair position an updated executive role for Smith, who currently leads a team of over 1,500 staff in 54 countries, according to his biography on Microsoft's website.Smith joined Microsoft in 1993 from law firm Covington & Burling t