If you are doing Iowa research, you should visit IAGenWeb -- a prime source for Iowa genealogy records, family history, ancestor obituaries, other Iowa historical records.
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.
Outlook uses two different types of data files, .pst and .ost. Both files types are vulnerable to some errors that could cause Outlook connectivity problems. If your file is an .ost file, then right click to rename the extension to .OLD. If your file is .pst, do not change anything just yet.