Instead, you will have to first upload the document on OneDrive, and then only you can edit an Office file on the web. Next, you can’t directly select and edit an Office document that is available on your local disk. It does not support offline editing or viewing. As it’s self-explanatory, the Web version is online only meaning you can access Microsoft Office on the web only when you are connected to the internet. First and foremost, we are going to discuss the basic differences between the web version of Microsoft Office and the desktop apps.