This policy setting controls the default location for storing macros in Excel 2007.
If this policy setting is enabled, Excel 2007 stores macros in users' personal macro workbook.
If you disable or do not configure this policy setting, Excel 2007 stores macros in the active workbook from which they are created.
Note: In the user interface (UI), the "Store macro in" drop down list box in the Record Macro dialog box (Macros | Record Macro) allows users to choose whether to store the new macro in the current workbook, a new workbook, or their personal macro workbook (Personal.xlsb), a hidden workbook that opens every time Excel 2007 starts.
By default, Excel displays the "Store macro in" box with "This Workbook" already selected in the drop-down list. If a user saves a macro in the active workbook and then distributes the workbook to others, the macro is distributed along with the workbook. If you enable this policy setting, Excel 2007 displays the "Store macro in" box with "Personal Macro Workbook" already selected. Users can still select one of the other two options in the drop-down menu.