Hey,
Follow the steps : 1. Download, install and launch Outlook Duplicate Remover on your PC;
2. Click Duplicate Remover button on the Outlook Ribbon;
3. If you need to change the folder, click on “Select another folder” and then click “Remove Duplicates” button.
The Outlook Duplicates remover software accepts you to eliminate the duplicates from multiple MS Outlook PST files at once.
Thank you.