The most effective way to remove duplicate emails in PST is to use the TrustVare Outlook Duplicate Removal tool. It scans your PST folders and removes duplicate emails without losing your original data, and you don't need to install any other software. This tool analyzes your PST file, detects duplicate emails, and safely removes them while preserving attachments, formatting, and folder structure. It is compatible with all Windows versions, like 11, 10, 8.1, 8, and 7. Non-technical users can also use this tool without technical skills, and they can try the free demo version before purchasing.