It does not affect OneNote for Mac, Android and iOS, OneNote on the web, OneNote for Windows 10, or OneNote in volume licensed versions of Office. The change affects OneNote for Microsoft 365 and OneNote in retail versions of Office. Security solutions may block the execution of these saved files, however. Microsoft notes that users may save the embedded files to the local system to execute them there, provided that they trust the sender. OneNote users can't open high-risk files, based on their extension, anymore directly. How to bypass the embedded file block in OneNote Changes made to this policy do affect other Microsoft 365 apps, including Word, Excel and PowerPoint. This is handled by "Allow file extensions for OLE embedding" found under User Configuration\Policies\Administrative Templates\Microsoft Office 2016\Security Settings in the Group Policy Management Console.
There is also a policy to allow certain blocked file extensions. Microsoft notes further that administrators should not use the "Embedded Files Blocked Extensions" policy, but without explanation. The policies are only available for Microsoft 365 apps for enterprise, and not for Microsoft Apps for Business. They may use the Block additional file extensions for OLE embedding” policy for that, which is found under User Configuration\Policies\Administrative Templates\Microsoft Office 2016\Security Settings in the Group Policy Management Console.Īnother option is to use the Cloud Policy service for Microsoft 365. xnkĪdministrators may add more file extensions to the blocklist. Here is the full list of blocked extensions: bat, but also many lesser known file extensions. It includes common file extensions such as. The full list is available on this support page. The high risk file extensions match the filter lists of other Microsoft products, including Outlook.
The dialog has just an ok button, and a close window control, but no option anymore to execute the embedded file. OneNote users see "Your administrator has blocked your ability to open this file type in OneNote". The OneNote update will block the direct opening of embedded files, if the file extension is on Microsoft's list of dangerous extensions. Users were able to bypass the warning to open the extension. OneNote showed a warning to users when they were about to open a high-risk attachment. The main change that Microsoft will introduce changes how 120 high-risk file extensions are handled by the application.
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