This policy setting allows you to specify a different folder location for Outlook Data File (PST) files on user computers. ...

This policy setting allows you to specify a different folder location for Outlook Data File (PST) files on user computers. If you enable this policy setting, you can specify a location for PST files on user computers.If you disable or do not configure this policy setting, PST files are located in: %USERPROFILE%\Documents\Outlook Files\ on user computers.