Cleaning duplicates is good; preventing them is better.
A dialog box will appear asking how you want to handle duplicates (e.g., keep the most recently modified version). Choose your option and click . Outlook will scan and merge or delete duplicates based on your choice. remove duplicate outlook
There are several third-party add-ins available that can help you remove duplicates in Outlook, such as: Cleaning duplicates is good; preventing them is better
prevent these duplicates from appearing in the first place? AI can make mistakes, so double-check responses Copy Creating a public link... You can now share this thread with others Good response Bad response 9 sites Clean up your inbox - Microsoft Support Clean up your inbox * Select an email conversation that you'd like to clean up. * (On the simplified ribbon) On the Home tab, sele... Microsoft Support Delete Duplicate Emails in Outlook This method of deletion requires the utmost attention. If you have many messages, sooner or later, you will make mistakes and dele... OutlookFreeware Manage duplicate contacts in Outlook - Microsoft Support Delete a large number of duplicate contacts by using export and import in classic Outlook. If you have a large number of duplicate... Microsoft Support Remove Duplicate Recipients in Outlook With 4 Best Ways Jul 14, 2025 — Outlook will scan and merge or delete duplicates