At Build Day 2, we announced OneDrive Files On Demand. Access all your files in the cloud without having to download them and use storage space on your device. You don’t have to change the way you work, because all your files—even online files—can be seen in File Explorer and accessed on-demand whenever they are needed.
At Microsoft Build 2017, we announced new opportunities for developers in three areas—updates to the Microsoft Teams developer platform, new capabilities in the Microsoft Graph and better ways to connect Office users with partner integrations. With over 100 million monthly commercial active users, Office 365 is the largest productivity service available. Office 365 offers an incredible opportunity for developers, with its business-critical data and millions of users, combined with a platform designed to keep people in the flow of their work.
Read about it on the Office blog.