If you want to delete duplicate emails from Outlook PST files, then you can try the best tool, the GainTools Outlook Duplicate Remover tool. The software quickly finds duplicate items in the Outlook PST files like email, contacts, notes, tasks, calendar, etc, and removes them without losing important data. It will support all Windows OS versions like 11, 10, 8.1, 8, and 7 without facing any issues. It has a simple UI for all non-technical users, and they can use it without any technical skills. The software manages a huge number of duplicate Outlook files without downloading any application.

Visit here: https://www.gaintools.com/pst/duplicate/