To resolve the issue where the warning message appears every time you try to open a file stored in SharePoint or OneDrive, try one of the following methods.Īdd the URL of SharePoint or OneDrive as Trusted Sites This is because editing the file in the cloud with a local application requires Office program to download a temporary file to local device before you’re able to view and edit it. The warning message is a security feature of Microsoft Office to protect against malicious attack. It is important to be certain that this file is from a trustworthy source.
Some files can contain viruses or otherwise be harmful to your computer.
