Anti-Dupe for Microsoft Outlook is a free and simple software add-in utility that allows you to delete unwanted duplicate records in your Microsoft Outlook folders. Anti-Dupe for Microsoft Outlookâ??s easy interface lets you quickly and easily remove duplicate records in your Microsoft Outlook Calendar, Contacts, Tasks and Mail folders based on criterion specified by Anti-Dupe for Microsoft Outlook. The criterion that Anti-Dupe for Outlook uses to find duplicate records in Outlook folders is not customizable.