Are you looking for a way to delete duplicate MSG files easily while retaining the email data and attachments? I would suggest trying SomeTools Remove Duplicate MSG. It will find duplicate MSG files and remove them without losing any data. Users do not need to install Microsoft Outlook as the software will work on all supported Windows OS, including Windows 7, 8, 8.1, 10, and 11. So it is easy for non-technical users to use. The software seems as secure as I have seen, and will easily remove duplicate MSG files. It will scan the entire Outlook MSG file. You, as a user, would only have to add the entire MSG file into the panel of the software, and you will see that three times.