Trying to remove duplicate emails from your Outlook PST file can be a frustrating job. Manually, you have to check each folder, compare emails one by one, and delete any copies you find. Outlook doesn’t offer a special tool for this, so you’re left sorting and guessing. It’s especially difficult if your mailbox has years of emails or multiple PST files to go through.
A smarter solution is to use the Aryson Outlook PST Duplicate Remover. This software does all the hard work for you. It scans your PST file and finds all duplicates based on things like sender, subject, date, and attachments. You can even set filters to remove only duplicates within a certain date range. The best part is you can choose what to do with the duplicates: delete them forever, move them to another folder, or just flag them. It’s reliable, works with all versions of Outlook, and makes the whole process easy and risk-free.

For more: https://www.aryson.in/software/outlook/pst-duplicate-email-remover/