Microsoft puts Application Guard for Office into public preview

Microsoft has launched a public preview of “Microsoft Defender Application Guard for Office,” a defensive technology that quarantines untrusted Office documents so that attack code carried by malicious files can’t reach the operating system or its applications.

On Monday, a senior cybersecurity engineer with the Redmond, Wash. company explained how Application Guard for Office worked and more importantly, walked customers through its operationm – something that existing documentation omitted when the public preview was launched late last month.

“Microsoft Office will open files from potentially unsafe locations in Microsoft Defender Application Guard, a secure container, that is isolated from the device through hardware-based virtualization,” John Barbare wrote in a post to a Microsoft blog. “When Microsoft Office opens files in Microsoft Defender Application Guard, a user can then securely read, edit, print, and save the files without having to re-open files outside of the container.”

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