About
SysTools Outlook Duplicate Remover is a comprehensive solution designed to identify and remove duplicate items from Microsoft Outlook PST and OST files without affecting the original mailbox structure or data integrity. Duplicate emails, contacts, calendars, tasks, notes, and journals often accumulate due to repeated synchronization, mailbox imports, PST merges, Exchange migrations, IMAP account configuration, or backup restoration. The software efficiently eliminates these redundant items, helping users organize their Outlook mailbox and improve overall performance.
The software supports both ANSI and Unicode Outlook data files, including PST and OST formats. It accurately scans mailbox items using advanced duplicate detection algorithms that compare multiple email properties such as Subject, Sender, Recipient, Message Body, Attachments, Sent Date, Received Date, Message ID, and Internet Headers. For contacts, calendars, tasks, notes, and journals, the application compares relevant attributes to ensure only true duplicate items are removed while preserving unique data.