This is an old revision of the document!
Login and Configuration: https://portal.office.com
OneDrive for Business sync app: http://go.microsoft.com/fwlink/p/?linkid=321300
Surprise! It doesn't seem to like Firefox much. Use IE at least for the setup phase.
You must allow popups.
Install the app even if it was installed previously with Microsoft Office.
Work
for OneDrive for Business account