

The issue can also occur when you open an embedded or linked Office file in an Office application. You may also have to download Administrative Template files to use the GPO. Replace with the affected Office application name, for example Word 2019.

User Configuration\Administrative Templates\Microsoft \ Options\Security\Trust Center\File Block Settings Open the Group Policy Management Console. Enabling a file type that's blocked by default could compromise security. The File Block Settings can be controlled by a Group Policy Object (GPO) and are part of the recommended security base line settings. In the Trust Center window, select File Block Settings, and then clear the "Open" or "Save" check box for the file type that you want to open or save. In the Options window, select Trust Center > Trust Center Settings. For example, if you cannot open a Word file, open a new document in Word 2016 or later versions to see the option. If you cannot open a file in Office, open a blank document to start the Office application. To resolve this issue, try the following general resolutions to change the File Block settings to disable the restriction of certain file types:

You are attempting to open a file that is blocked by your registry policy setting.In this situation, you may receive an error message that resembles one of the following: A file is blocked when you open or save the file in a Microsoft Office program.
