Removing duplicate emails in a PST file manually can be a tedious task, especially when dealing with large Outlook data files. The manual process involves opening Microsoft Outlook, navigating to the specific folder (such as Inbox or Sent Items), sorting emails by subject or sender, and then deleting duplicates one by one. You can also use the "Clean Up” feature in Outlook under the Home tab to remove redundant messages in a conversation or folder. However, this approach is time-consuming and prone to errors, as it may overlook deeply buried or slightly altered duplicate emails.

For a more efficient and reliable solution, using an automated tool like the Cigati Outlook Duplicate Remover Tool is highly recommended. This software simplifies the process by scanning your PST file thoroughly and removing duplicates based on multiple criteria such as To, From, Subject, Date, Attachment, etc. It supports batch processing and works with both ANSI and Unicode PST files, making it ideal for personal and professional use. Moreover, it allows users to save the refined file at a desired location without risking data loss. By using the Cigati tool, users can save time and ensure the accuracy and integrity of their Outlook data.