Microsoft Corp (MSFT.O) will buy LinkedIn Corp (LNKD.N) for $26.2 billion in its biggest-ever deal, marking CEO Satya Nadella’s first big effort to breathe new life into the software giant’s business-productivity tools. Microsoft to buy LinkedIn By connecting core software like Microsoft Word and PowerPoint with LinkedIn’s network of 433 million professionals, the deal marks a turn for Microsoft, which stumbled in a mobile phone...