Block opening of Word 2003 XML file types

This policy setting controls whether Word 2007 users can open files saved in the XML format used by Word 2003.
If you enable this policy setting, Word 2007 users will not be able to open Word 2003 WordprocessingML files.

If you disable or do not configure this policy setting, Word 2007 users can open files saved in the WordprocessingML file format introduced with Microsoft Office Word 2003. WordprocessingML documents usually have a .xml extension.

Note - See Plan block file format settings in the 2007 Office system ( in the 2007 Office Resource Kit for more information about using Group Policy to manage and enforce file format requirements. Also, see the "File Block Technology" section in Chapter 4 of the 2007 Microsoft Office Security Guide for information about the Microsoft Office Isolated Conversion Environment (MOICE), which provides another method.

Supported on: At least Windows Vista

Registry PathSoftware\Policies\Microsoft\Office\12.0\Word\Security\FileOpenBlock
Value NameXmlFiles
Enabled Value1
Disabled Value0


Administrative Templates (Computers)

Administrative Templates (Users)