This policy setting controls whether users can open non-PowerPoint files as outlines in PowerPoint 2007.
If you enable this policy setting, users will not be able to open outline files with the listed file extensions.
If you disable or do not configure this policy setting, users can create presentation outlines in other applications and open them as outline files in PowerPoint 2007. PowerPoint can open outline files saved with the following extensions:
Note - See Plan block file format settings in the 2007 Office system (http://r.office.microsoft.com/r/rlidGroupPolicyBlockFileForm2?clid=en-us) 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.