You can also opt for a reliable Third-Party Outlook Duplicate Remover tool for permanently removing the Outlook duplicates. The third-party tools are developed in such a way that you do not need to worry about duplicate emails or other duplicate Outlook items anymore.
One such application is Shoviv Outlook Duplicate Remover. The software automatically finds and removes duplicate items from your Outlook. It is the best and proven solution to remove Outlook duplicate items. It provides you many options to find duplicate items. A free version of the software is also available that allows you to remove duplicate items. You can also remove 25 items from each folder with this free Outlook Duplicates Remover tool.
For more info visit here: Outlook Duplicate Items Remover