Specify Automatic Installation Options Based on File Name Extension
Applies To: Windows Server 2008
To specify automatic installation options based on file name extension
Open Group Policy Software Installation. (In the console tree, right-click Software installation.)
In the console tree, right-click Software installation.
Click Properties, and then click the File Extensions tab.
On the File Extensions tab, specify the following options:
Select file extension: Displays a list of all available file name extensions for the managed software. When a file name extension is selected, all applications in Active Directory that are associated with the selected file name extension are displayed in the Application precedence list box. For example, many applications can be associated with the .htm file name extension, such as Web browsers and some word processors.
Application precedence: Lists all the applications that are associated with the selected file name extension. You can determine precedence by using the Up and Down buttons to set the order of the applications.
Up: Moves the selected application higher in the precedence list. The application at the top of the list is automatically installed if a document with the selected file name extension is invoked before the application has been installed. The Up button is unavailable when the selected application is at the top of the precedence list.
Down: Moves the selected application lower in the priority list. The Down button is unavailable when the selected application is at the bottom of the precedence list.
Additional considerations
To complete this procedure, you must have Edit setting permission to edit a GPO. By default, members of the Domain Administrators security group, the Enterprise Administrators security group, or the Group Policy Creator Owners security group have Edit setting permission to edit a GPO.
When you upgrade an application, turn off automatic installation for the older version.