How to Remove Duplicates from Outlook Mailbox?

You can remove duplicates from your Outlook mailbox by scanning your PST files with the SysInfo Outlook Duplicate Remover Tool. After adding one or multiple PST files, the tool identifies duplicates using criteria like sender, subject, date, or attachment information. You can filter by item type and date range, preview results, and select what to do with the duplicates—delete them, move them, or save them separately. The tool generates a new PST file free of repeated items, which reduces mailbox size and helps prevent corruption.