Microsoft Corp. CEO Satya Nadella may unveil an iPad version of the Microsoft Office software suite on March 27, Reuters reported. Nadella is set to use his first big press conference to launch the product when he addresses the media and industry executives in San Francisco that day. Investors have urged Microsoft for years to adapt Office for mobile devices on Apple and Google Inc. products, as the company gives up nearly $2.5 billion a year in revenue by keeping Office off the iPad.