Aug 25 2020 08:51 PM
Aug 27 2020 10:21 AM - edited Aug 27 2020 10:22 AM
Maybe this PowerShell script from Michael de Rooy in the TechNet Gallery will help you.
Sep 01 2020 12:07 AM
@AllardBeerthuizen Thank you for pointing me to the Delete Duplicate Emails script. I must be doing something wrong. I downloaded the file "Remove-DuplicateItems.ps1" and double-clicked on it. It's a text file that describes the script. I went to https://eightwone.com/2013/06/21/removing-duplicate-items-from-a-mailbox/ and read Michel de Rooij's article. In a Cmd window I ran "Remove-DuplicateItems.ps1 -Identity Patricia -Type Mail -Retain oldest -DeleteMode MoveToDeletedItems" in the directory that "Remove-DuplicateItems.ps1" is located, copying the format of the script Michel ran in his example. Nothing happened. No error, no messages of any kind, no files in my Deleted folder, and duplicates are still in my Inbox. What am I doing wrong?