Sometimes mailbox storage fills up quickly because duplicate emails are stored across several folders in the PST file. These duplicates can make the mailbox larger than necessary and reduce Outlook performance. That is why many users search for methods to increase Outlook mailbox size by removing unnecessary duplicate data. The MSOutlookHelp Outlook Duplicates Remover includes Bulk Mailbox Processing capability, which allows users to scan multiple PST files at the same time. The tool also offers different comparison criteria such as subject, sender address, attachments, and message body to detect duplicate emails accurately. With high-speed and accurate data processing, it ensures that only duplicate items are removed while the original emails remain untouched.