To develop a greater ability to win, serve, and retain customers, CIOs are building a strong business technology (BT) agenda. This requires them to reassess and evolve their tech vendor portfolio. In this report, we assess whether and how Microsoft can contribute to your firm's BT agenda. Originally a maker of operating systems and office software, Microsoft now supports a sprawling ecosystem of partners with public cloud infrastructure, platforms, and application services. We outline four ways CIOs can choose to work with Microsoft in the age of the customer.