It's good for Dropbox, because they can push further into the enterprise market. When business users try to decide between Dropbox and OneDrive, Office integrat

It's good for Dropbox, because they can push further into the enterprise market. When business users try to decide between Dropbox and OneDrive, Office integration won't be an issue for Dropbox any more. Dropbox has its own merits over OneDrive. OneDrive is not as friendly and feature-complete as Dropbox is. And Dropbox has far better APIs when it comes to integrating with other services. And as far as Microsoft is concerned, the partnership improves people's productivity.