How to change or modify the default data file in Microsoft Outlook?
If you are using an existing PST, add it to your profile using the File, Open, Outlook Data File menu. The PST can be stored anywhere on your hard drive.
From the Tools, Email Accounts menu, select View or change existing email accounts. Then next to open the Email Accounts dialog, select the dropdown menu below Deliver new email to the following location and select the data store you want to use. In this example, I have two Outlook Connector accounts and one Exchange server account to choose from.
Select the file you wish to use and click Finish. You may need to restart Outlook for the changes to take effect.
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