How do I edit the email subject line on the newer version outlook?

Question

This is one of the most used tasks in my line of work. (Mortgage / Finance)

Answer 1

Dear @Pebbles Rodz,

Good day, and thank you for reaching out to the Q&A Forum. I understand that you would like to edit the subject line of a received email in the new Outlook. From my research, this feature is currently only available in Classic Outlook.

As a workaround in New Outlook:

• Reply to the email.
• Delete the original quoted text.
• Manually change the subject line in your reply.
• Send the message to create a new email thread with the updated subject.

Or switch back to Classic Outlook

If you need to directly edit the subject of a received email, you can switch back to Classic Outlook:

• In New Outlook, turn the “New Outlook” toggle in the top-right corner to Off.
• Open the email in Classic Outlook by double-clicking it so it opens in a separate window.
• Edit the subject line and save the changes.

If this is a feature you would like to see, I suggest keeping an eye on the Microsoft Outlook(new) blog or the Microsoft 365 Roadmap | Microsoft 365 for any updates on this feature. In the meantime, I apologize for the inconvenience this may cause. I also strongly recommend that you share your detailed experience and feedback directly with the Microsoft product team through their official channels. This is the most effective way to make your voice heard and influence future feature improvements and adjustments. 

You can visit the Outlook (new) · Community to submit a new idea or vote on existing one here: New Outlook does not allow you to modify the subject line · Community. The product team is in charge of this site, and they constantly check customer reviews and feedback. The higher the number of votes, the more attention the team will pay to it. Many features are developed and improved based on customer feedback. As a moderator, I will also pass along your feedback to the appropriate team for further consideration. While we don't directly influence product design, user feedback is actively reviewed and helps prioritize future development. If you’re unable to submit feedback yourself, please feel free to reach out to me, and I’ll be happy to submit it on your behalf. 

I really understand how convenient this feature would be for your workflow. I want you to know that I wish I had a way to change it for you directly but as a moderator of Q&A forum, my ability to assist is with the existing product functionality and the power to influence its design rests entirely with Microsoft product development team. I appreciate your kindness and understanding as Microsoft continues improving the New Outlook experience. Please feel free to reach out again if you need assistance with anything else.

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Answer 2

If I toggle back to the old version, my Outlook for some reason DOES NOT WORK. So, this isn't an option for me.

Answer 3

New Outlook (modern Microsoft 365 version)

Microsoft Outlook Version: 1.2026.520.400

Client Version: 20260522011.09

WebView2 Version: 148.0.3967.96

Session ID: [Moderator note: Personally Identifiable Information removed] 

What you stated above doesn't work for my issue.