Duplicate Killer for Microsoft Outlook is a powerful plug-in for searching, managing and eliminating any type of duplicates (e-mails, contacts, tasks, calendar items (events, appointments, meetings), notes, journals) across all or chosen Outlook folders (including public folders). New Report Of Found Duplicates. The updated report with the list of found duplicates now provides more options to manage your duplicate items, and simplifies the process of resolving. Duplicate Merging dialog functionality has been dramatically improved, allowing you to quickly review and merge the fields you want. New properties to search added to Calendar and Contacts Wizard.