The ability to export to Excel from a document library or a SharePoint list.The ability to open documents in a rich client app when a document library link is selected.This issue occurs regardless of your library settings.Īdditionally, many other SharePoint integration features don't work. When you try to open a file from an on-premises installation of Microsoft SharePoint Server or from SharePoint Online in classic view, the browser defaults to either downloading a local copy or trying to open the file in the browser.