"The integration creates a natural, collaborative experience in which you can co-author and have a conversation using instant messaging or video calling right from within a document. Best of all, your instant messaging history stays connected to the document, so that the next time you open it, you can pick right up where you left off. Office Online exists to help you collaborate with anyone, anywhere, with just a browser. Now with Skype communication built right in, you can get more done, faster."
In addition, users of Google's Chrome browser can now download a new extension that will allow them to open and create Office Online documents from within the browser. Microsoft says:
"You can also use the extension to open and view existing Office documents stored on OneDrive, on OneDrive for Business and on your computer right from Chrome."