Is your Outlook mailbox cluttered with duplicate messages slowing things down? The Aryson Outlook PST Duplicate Remover scans your PST file and finds duplicate emails, contacts, calendar entries, tasks, and attachments so you don’t have to sort through duplicates manually. It supports both ANSI and Unicode PST formats and works smoothly without needing Outlook installed. The tool lets you choose match criteria—such as subject, sender, date, or attachment size. Once it’s done, it creates a backup of the original PST before cleaning up, so you can restore it if needed. Moreover, it preserves the folder layout, so nothing shifts when duplicates are removed.