While you can remove duplicates by hand, the tools on this page make it easier when there are a lot of duplicates. Although some of these tools work only with the mail folders, many will work on any Outlook folder that contains duplicates. Featured Products ReliefJet EssentialsUse ReliefJet Essentials for Microsoft Outlook to remove, mark  

This page contains utilities that automate the removal of duplicate appointments. If the duplicate appointments are the result of importing, you can add the modified date field to the view and sort by it, then delete appointments based on the modified dates. When the cause of the duplicated appointments is PDA synchronization one of the  

This is a collection of tools used to remove duplicates from your Microsoft Outlook Contacts folder. Some of these tools will also remove duplicates from other Outlook folders. When the duplicates are the result of importing and all are duplicated, you can sort by the modified date field (you'll need to add the Modified field  

Starting with Outlook 2000, if you create an entry in a Contacts folder that matches an existing entry, Outlook asks whether you want to merge the information, ignore the new contact or save it as a new contact anyway. In Outlook 2010 and up, the setting to check for duplicate contacts is in File, Options,