How to manage .pst files in Microsoft Outlook - Outlook
https://learn.microsoft.com/en-us/outlook/troubleshoot/data-files/how-to-manage-pst-files
WebMar 31, 2022 · In Outlook 2010: Use the following steps to restore, or import, your data into Outlook: Select the File tab. In the Open category, select Import. In the Import and Export Wizard, select Import from another program or file, and then select Next. Select Outlook Data File (.pst), and then select Next.
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