Shweta Kalghatgi wrote:
Are you having this issue only with documents stored in the OutSystems database?
This is, first of all, a matter of configuration on the desktop side, as the article below exemplifies: https://social.technet.microsoft.com/Forums/sharepoint/en-US/b4ed8ffc-3c89-4b9b-9a25-71a22dca2f04/how-to-open-ms-word-document-in-browser-window?forum=sharepointgenerallegacy
E.g. can you go to Windows Explorer in your desktop and open an Office file with the browser?