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OneNote warning with new change (Credit: Microsoft) The user will instead receive a dialog stating that the administrator has restricted their ability to open the file type. The change now completely blocks suspicious OneNote attachments instead of issuing a warning if a dangerous extension is detected. JS, according to a Microsoft 365 support page. The list includes a total of 120 extensions, including. In a Microsoft 365 security update, the company announced it will block by default the same extensions as Outlook, Word, Excel, and PowerPoint to defend users against ongoing phishing attacks associated with OneNote.
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Microsoft improved security for OneNote by blocking files with potentially hazardous extensions from the popular note-taking software.
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