Yes, it is possible to remove duplicate contacts and calendar entries from multiple PST files. You can try the best tool like TrustVare Outlook Duplicate Remover. It automatically finds duplicate items in Outlook files like email, calendar, contacts, notes, tasks, events, etc, and removes them without harming your original data. It will work on all Windows OS versions like 11, 10, 8.1, 8, and 7 without installing any application. It has an easy interface for non-technical users and they can easily operate it without facing any issues. It will provide a free demo version before buying this tool.
