Safe Documents is a new feature in Microsoft Office 365 that improves the existing Protected View experience. Although Protected View helps secure documents originating outside the organization, people too often exit the protection sandbox without considering if the document is safe – leaving their organizations vulnerable. To improve this trust promotion experience for Microsoft 365 Apps, Safe Documents takes away the guesswork by automatically verifying the document against the latest known risks and threat profiles before allowing users to leave the Protected View container. 

Safe Documents leverages the power of the Microsoft Intelligent Security Graph and brings it to the desktop. With Safe Documents enabled, untrusted files that open in Protected View go through an additional process where the document is uploaded and scanned by Microsoft Defender ATP. During the process your data is encrypted and protected by Microsoft to the same standards used across Office 365.