find duplicate items in Outlook Duplicate Killer for Microsoft Outlook enables you to find and process duplicate emails, tasks and calendar items in Outlook. You can define the properties to compare (e.g subject, sender, size etc.) and set criteria as to which items should be considered duplicates. The found items can then be reviewed and either moved, deleted, flagged or merged. Copyright Snapfiles.com
Trial Limitations: The processing of duplicates during the trial is limited to 10 items.