A family of Microsoft products that enable users to capture, organize, and reuse notes electronically.
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To resolve the OneNote sync issue you may also refer to the following Microsoft Article:
Note: The steps suggested in the above Microsoft Articles are for OneNote 2013, however, the same steps will apply for OneNote 2016 as well.
If the steps suggested in the above mentioned article do not work, then you may refer to the following Microsoft Article to resolve the issue syncing to OneDrive:
Hope the above information helps.
Thank you.