Using the Clean Up Feature in Outlook

The “Clean Up Conversation” feature in Outlook allows an end user to delete redundant messages that have been replied to in a conversation or folder.

1.) Select a conversation or folder that you would like to clean up.

2.) On the “Home” tab, click the drop-down arrow next to the "Delete" button as shown in the picture below.

The "Trash Tin" icon, is the Delete button, under the "Home" tab in the ribbon in Outlook. Also shown: "Clean Up Conversation" and "Clean Up Folder."

3.) A confirmation will pop-up by default. Confirm by clicking "Clean Up."

NOTE: You can check the "Don't show this message again" box and then click "Clean Up" to prevent this prompt from popping-up in the future.

Confirmation prompt; click "Clean Up" to proceed. You can check the "Don't show this message again" box to skip this in the future.

This feature can resolve clutter in specific conversations, but you can also clean up entire folders by using "Clean Up Folder" instead.

Reference:

Clean Up Your Inbox - Microsoft Support (https://support.microsoft.com/en-us/office/clean-up-your-inbox-2fb652e5-b387-4147-9fff-25f2e32dfda9)

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