The most effective method for eliminating duplicates in Outlook is the Regain Outlook Duplicate Remover Tool. This trustworthy and effective software enables you to swiftly eliminate duplicate emails, contacts, calendar entries, tasks, and additional items from your Outlook PST, OST, and BAK files. It is compatible with all Outlook versions, such as 2021, 2019, 2016, and Outlook 365. The tool searches for duplicates using adjustable criteria such as sender, subject, and recipient, guaranteeing precise results. Thanks to its user-friendly interface, even those without technical expertise can effortlessly clean up their inbox and enhance Outlook’s performance, positioning it as the ideal answer for effective duplicate deletion.