Use Deduper to clean up your Microsoft Outlook from duplicate items of any type in no time. Find and remove duplicates from Outlook with one mouse click. Search and remove all types of duplicates (appointments, contacts, emails (messages), journal, notes and tasks). Merge Outlook duplicates. Deduper search is customizable to accurately identify all duplicates. It can search across different folders. Find duplicates quickly - start searching with just one mouse click!