FAQ-Wiki-Outlook

How to make a new PST file the default file in Outlook?
Answer:

You should:

  1. Open Start | Settings | Control Panel | Mail
  2. Use the Delivery tab to select the corresponding PST file in the Deliver new mail to the following location: combo box and confirm moving the service folders (if necessary).

Thus, the new pst file will be the file used in Outlook by default.