Smart move by :

That’s why we’re partnering with Microsoft to help you do more on your phones, tablets, and the web. Soon you’ll be able to access your Dropbox directly from Office apps, and edit Office files from the Dropbox app.

I was afraid that Dropbox had lost its vision, but this partnership shows the opposite. Lots of users need to use Office, but love syncing their docs via Dropbox rather than OneDrive. 

Hats off to Microsoft too, for allowing a competitor in the document syncing business to work with their office suite.