The best method to eliminate duplicates in Outlook is by utilizing the Regain Outlook Duplicate Remover Tool. This robust software offers a fast and dependable method to detect and remove duplicate emails, contacts, tasks, calendar items, and additional data from your Outlook PST, OST, and BAK files. It is compatible with all Outlook versions, such as 2021, 2019, 2016, and Outlook 365. By using adjustable search criteria, you can eliminate duplicates based on the sender, subject, and additional parameters for accurate outcomes. Its user-friendly interface simplifies usage, aiding you in maintaining your Outlook organized and operating smoothly without any difficulty.