We are experiencing the same issue.
Does Aspose Note provide any support for modifying OneNote (2010/2013) documents stored in SharePoint 2013?
Hi Joerg,
Thank you for contacting support. Unfortunately, there is no way to accomplish this requirement. As a workaround, you can build custom application using our Aspose.Note for .NET APIs in SharePoint 2013. There should be no issue in using .NET APIs in SharePoint 2013. If you see any issue, please feel free to reply us.