When Microsoft named Satya Nadella the third CEO in its history this past February, we posited 10 questions he needed to answer to ensure Microsoft's future relevance to enterprises. As Nadella's first 100 days come to a close during the company's annual TechEd conference, it's clear he's not a caretaker of "business as usual" but rather a change agent who has put Microsoft on a bolder path. Give away the Windows runtime to drive adoption? Check. Release a native Office app for Apple's iPad? Check. Support Git and other popular continuous delivery tools on Azure? Check. These and other Nadella actions ensure that Microsoft's fortunes will improve. Read on for the full picture.