Outlook Duplicate Remover tool
Outlook Duplicate Remover tool is the most effective solution to remove duplicate items from Outlook PST files. Duplicate items in Outlook PST files create a lot of confusion among users, so it is necessary to remove duplicates.
Duplicate items in Outlook PST files are created because of the same email address, same subject, and same body. Duplicates take a lot of space and it slows down the speed of Outlook PST files. That’s why it is necessary to remove duplicates to speed up the speed of Outlook PST files. Outlook Duplicate Remover tool removes duplicate items from Outlook PST files.
https://www.syscurve.com/outlook-duplicate-remover-tool.html

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Devide commented
You can install the TrustVare Outlook Duplicate Remover Tool to remove multiple Outlook PST duplicate emails, contacts, notes, calendars, drafts, and other data without difficulty. This software is the best solution for non-technical users to remove duplicate Outlook PST files without error because of its simple graphical interface. This software can be installed on Windows OS. Also, it offers a free trial to examine the features of Outlook Duplicate Remover.