Partnership between Microsoft and Dropbox took its second step after the mobile apps integration. This time its the integration between Dropbox on the web and Office Online. Now you can connect your Office Online to Dropbox and save files there to edit them from anywhere you want.
You can easily add your Dropbox account to Office Online just by signing in with your Dropbox account. So you can create new files in Office Online, and save them directly to your Dropbox.
And on the web browser you can access all the files saved on your Dropbox and you can edit them by just clicking the Open button while previewing any Word, PowerPoint or Excel files.