In the left pane of the Group Policy Management Console, double-click User Configuration and double-click Administrative Templates (Classic Administrative Templates (ADM) in Windows Vista).

To change default file save options in Office Excel 2007:

1. Double-click Microsoft Office Excel 2007, double-click Excel Options, and click Save.

2. In the right pane, right-click Save Excel files as, and select Properties.

3. In Save files in this format, select Enabled.

4. In the drop-down box, select a default file save format.

5. Click Apply to save the settings.

To change default file save options in Office PowerPoint 2007:

1. Double-click Microsoft Office PowerPoint 2007, double-click PowerPoint Options, and click Save.

2. In the right pane, right-click Save files in this format, and select Properties.

3. In Save files in this format, select Enabled.

4. In the drop-down box, select a default file save format.

5. Click Apply to save the settings.

To change default file save options in Office Word 2007:

1. Double-click Microsoft Office Word 2007, double-click Word Options, and click Save.

2. In the right pane, right-click Save files in this format, and select Properties.

3. In Save files in this format, select Enabled.

4. In the drop-down box, select a default file save format.

5. Click Apply to save the settings.