I have a brand new HP desktop machine running Windows 10 and MS office 365. I downloaded/installed the Dropbox app, logged in and synced everything "online only." When I go to windows File Explorer and double click on an office file (Word doc, Excel spreadsheet or Powerpoint presentation) stored in DB, I get an error that simply says: "[Path\filename] Unspecified Error." I am able to open the file by launching the appropriate Office application, choosing "file", "open" and navigating that way. I can copy a file to my desktop and open it from there. I am also able to create an office document and save to a dropbox folder. I have another PC and a laptop connected to this same dropbox and there are no such issues on those machines; simply double click the file in windows File Explorer, and it opens. Other file types in Dropbox work fine. I have read plenty of "work arounds," but cannot believe that I should have to resign myself to the fact that DB simply works on some computers but not others. My volume of work is too high to rely on "work arounds."
I have put the computers connected to this DB side by side and compared every setting and they are identical. I have uninstalled everything, including windows, to no avail. DB chat support was useless, and phone support is non=existant, so I am hoping for a remedy here before moving the whole thing to Google Drive.