Using Classic Outlook on Windows for personal email, calendar, and contact management
Dear Muhammad,
Good day!
Thank you for posting to Microsoft Community. We are glad to assist!
I understand your concern and you are absolutely right, in the classic outlook downloaded attachment show date modified of the date the email was received. However, in new outlook I can reproduce your issue at my side. It could be Microsoft changed something at backend. In the meantime, I do apologize for the inconvenience this may cause and I will report it to our Product Development Team and hopefully this can be included in the future updates.
Please note, since the new outlook is still under active development, Microsoft is constantly working on improving their products and adding new features. I suggest keeping an eye on the Microsoft Outlook blog Things to look forward to in the new Outlook for Windows - Microsoft Community Hub or the Microsoft 365 Roadmap | Microsoft 365 for any updates on this feature. Moreover, you can also provide your feedback directly to the new outlook developer team via the new outlook in-app feedback site. to do this, go to Help-->Feedback or post this concern as an idea to our Outlook feedback site via Outlook · Community (microsoft.com). However, if you heavily rely on this feature, you may consider toggling out of the new Outlook for Windows preview for now. I will also update here once I get additional information and the specific timeline for the feature will be added. Thanks for your precious time and your understanding would be highly appreciated. Have a nice day!
Best regards,
Inema |Community Moderator