I'm having trouble with not being able to sync in OneNote 2016, it errors out stating 'We need the password to sync this notebook. Error code 0xE0000024'.
This happened after I upgraded my machine to Office 2016 from Office 2007.
I researched the error and deleted all cached credentials in Control Panel > Users, no change.
I signed out of OneNote and signed back in with my Windows credentials, no change.
I signed into One Note Online and did not see my notes there either.
Any other ideas?