SysTools Outlook Duplicate Remover Tool

SysTools Outlook Duplicate Remover is a powerful utility designed to detect and remove duplicate items from Microsoft Outlook. Over time, Outlook data files (PST/OST) can accumulate redundant emails, contacts, calendars, tasks, and journals, making the mailbox bulky and slowing down performance. This tool ensures a clean and optimised mailbox by eliminating duplicates without affecting original data.

The software offers multiple deduplication criteria such as Subject, Sender, Receiver, Text, and Date, giving users complete control over the filtering process. You can remove duplicates within a single Outlook file or across multiple PST/OST files in batch mode. It also provides two options – Within Folder and Across Folder – allowing users to customise how duplicates are detected and deleted.