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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 set a password on an outlook pst file go to the top level of your folder where outlook today is found the folder name may include outlook today or your email account name