How to Remove Duplicate Emails from Outlook For Free?

TIP: Latest version of Deduper for Outlook allows to remove duplicate emails automatically with a single click.

Less known Outlook (starting from version 2010) feature is built-in duplicate email removal. Using this feature you can remove duplicate emails from Outlook for free, without using any additional software.

To access this feature select mail folder, go to Home tab > Delete section > Delete > Clean Up.

To remove duplicate emails in Outlook you have 3 choices:

  • Clean Up Conversation - Selected Conversation is deduped.
  • Clean Up Folder - All Conversations in the selected folder are deduped.
  • Clean Up Folder & Subfolders - All Conversations in the selected folder and any subfolders are deduped.

Unfortunately, this only works for emails and does not allow much customization. We recommend using additional software such as Outlook Duplicate Remover to use in more complicated scenarios.