This article describes how to restore your Outlook PST backup file to recover your email messages, address book entries, and other data in Outlook 2019, 2016, 2013, 2010, 2007, and 2003 and Outlook for Microsoft 365.
How to Backup and Restore Your Email, Contacts, and Calendar with Microsoft Outlook
Here's how to use your backup PST file to restore Outlook data to the same computer, to another computer, or to another email account.
Go to File > Open & Export > Import/Export. In Outlook 2007 and 2003, go to File > Import/Export.
Select Import from another program or file and select Next.