Microsoft has restructured its apps for the Android platform, mainly by combining all of them into one. It is now called Office on the Play Store, and allows access to OneDrive as well as Word, PowerPoint and Excel. However, it is reportedly not optimized for tablets.
https://www.notebookcheck.net/Microsoft-consolidates-multiple-services-into-its-new-Office-for-Android-app.454199.0.html