Until now the only way I found to get rid of this issue was to disable / deactivate the antivirus engine from Central Administration. Activating Trend Support/System Debugger will not help either (you will not find any entries to demystify this issue). Unfortunately changing the Trend Micro PortalProtect settings (like deactivating real-time security risk scan) does not help.

If from SharePoint Central Administration we deactivate the Antivirus solution (basically not use Trend Micro PortalProtect for Microsoft SharePoint), the error message will not be shown in the page and the insert picture functionality will work again in OneNote Web App. The SharePoint logs are clear as possible: “Failed to scan file /sites/XXX/SiteAssets/My Notebook/Untitled Section.one due to scanner crashed.”. Talk to your administrator to resolve the issue. The error message will be “OneNote cannot sync this section because it has a virus. If you try to sync the OneNote to SharePoint using Microsoft Office OneNote 2013 (PC version) the sync fails only for those sections of OneNote where you have attachments.Please copy your changes to a clean section and delete the original file.”. When you are opening an OneNote file in the browser using OneNote Web App, whenever you try to insert pictures into your notes you will receive “Changes can’t be saved because there might be a virus in this section.“OneNote cannot sync this section because it has a virus.

Please copy your changes to a clean section and delete the original file.” ”Changes can’t be saved because there might be a virus in this section. In case you are using Microsoft Office Web Apps 2013 & SharePoint 2013 and your farm is configured to use Trend Micro PortalProtect for Microsoft SharePoint as antivirus solution, it is possible to receive one of these two error messages whenever you try to add attachments to your OneNote files. Even if Trend Micro released the Hot Fix, this post will remain on this page as reference for those who hit the same issue. I opened a Trend Micro support case number for this problem.

Onenote does not synchronize