Can I fix duplicate MSG files without opening each file manually?

Yes, you can fix duplicate MSG files without opening each file. I can suggest the best tool I'm also using. You can try the GainTools MSG Duplicate Remover tool, which can remove duplicate MSG files without facing any issues. You don't need to open each file, this tool automatically finds multiple duplicate items in MSG files remove it all folder. The software is a simple UI for non-technical users to easily operate this tool without technical skills. You can use this tool on all Windows OS versins like 11, 10, 8.1, 8, and 7. Don't buy the full edition, first try the free trial and see the removal process.