I have installed the dropbox plugin form outlook and initially it was working fabulously. Now when i try to save an attachment to dropbox from outlook it keeps asking me to sign in then get a blank box. I cannot see any addin installed for dropbox or find anyway of doing this. This is very frustrating as it was a fabulous option to have and made the saving of attachments so easy but now it is very frustrating. I have tried re adding the plug in and done a repair on outlook but still does not work. The outlook is part of Office 365. Any suggestions??