Just installed Office 2016 ProPlus volume licensing on two computers. A new Surface Book and a machine with Office 2013 O365 uninstalled and 2016 ProPlus reinstalled. Notebooks installed on both continually display "OneNote needs a password to sync this notebook" if the notebook is located on a SharePoint site. Both machines appear to sync correctly to a OneDrive associated with a Microsoft ID (also the machine log-in for both machines). All the problematic notebooks have the same Office 365 corporate (E3) log-in.
I need the 2016 ProPlus volume license rather than O365 so my Visio 2016 and Project 2016 will work (Why is beyond my comprehension other than marketing/licensing tricks)