For enterprise users, the best method to remove duplicate attachments from Outlook is to use an automated PST duplicate management solution such as SysInfo Outlook Duplicate Remover. In enterprise environments, mailbox data is usually spread across multiple PST files and departments, making manual duplicate removal inefficient and risky.

The software simplifies the process by allowing administrators to add multiple PST files simultaneously and perform bulk duplicate scans. It can detect duplicate attachments, emails, contacts, tasks, and calendar entries across folders or entire PST files. Users can apply filters, choose duplicate comparison criteria, and decide whether to delete duplicates, move them, or save attachments separately. Since the original email messages remain intact, organizations can optimize mailbox storage without losing important communication data.
Read more: https://www.sysinfotools.com/recovery/outlook-duplicate-remover.php