Office 365 Documents Do Not Open in the Browser

Office 365 allows users to create and open Office 2010 compatible documents using the Office Web Apps. This is basically the office web client which frees the user from the need to have the Office 2010 client installed.  There may be some cases when the editing or creation of new documents is not done by the web client, and instead the browser tries to download the file showing you this dialog:

Download File Dialog

This is usually due to an add-on installed on the IE browser.  To disable this add-on, do the following:
  • Click on tools
  • Click on Manage Add-ons
  • Click on the dropdown that displays Currenlty loaded add-ons and change this to show all add-ons
  • On the right panel, look for Sharepoint OpenDocuments Class and click Disable

Disable OpenDocument Class

The browser will no longer try to download the document, and the file will be open right on the browser. Keep in mind that this is only applicable to Office 2010 compatible documents like:

  • Word
  • Excel
  • OneNote
  • PowerPoint

I hope this helps