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The Default path for All Microsoft Office Outlook .pst file location is the User data(Your account name)/Local Settings/Application Data/Microsoft/Outlook/ this is where the .pst files are stored by default!!! this goes for All Windows OS! Tuesday, June 05, 2012 12:18 PM.
To automatically back up these folders, create a backup of your .pst file. The Microsoft Outlook Personal Folders Backup tool is an Outlook add-in that automates the backup process. The Microsoft Outlook Personal Folders Backup tool works with Outlook 2000, Outlook 2002, Outlook 2003, and Outlook 2007.