How to see if you've replied to an email

Good day @Evans Amy, and I appreciate the clear explanation of your concern.  

In my testing across New Outlook, Outlook on the web, and Classic Outlook, I was able to see the banner message “You replied on (date & time)” when opening the original email from the Inbox. 

Please note that this banner only appears when viewing the original message in the Inbox. If the message is opened from Sent Items, this banner will not be displayed. 

To help me better understand the situation and assist you effectively, could you please share a few details such as:   

1/ When you open the original message from your Inbox, do you see the “You replied on…” banner as shown in the example I shared? 

2/ Are you currently using New Outlook for Windows or Outlook on the web? 

(If possible, you may also share a screenshot showing the behavior on your side. Please ensure that any personal or sensitive information is hidden or blurred before sharing.) 

This will help me better understand the context and provide more targeted support. Any additional information will help me better understand and support you.    

In the meantime, you can try some workarounds below to verify the issue: 

Option 1: Verify behavior in Outlook on the web 

If you are using New Outlook for desktop, I recommend checking whether the behavior is the same in Outlook on the web. This can help determine whether the issue is related to the app or the mailbox experience. 

Open a web browser, then go to the browser settings and clear browsing data. Set the time range to "All time" to avoid issues caused by outdated cache.     

Go to https://www.office.com and sign in your work account.    

Once signed in, select Apps > Choose Outlook > Open the original message from Inbox and check if the reply banner appears. 

Option 2: Clear your New Outlook desktop app cache 

Close the Outlook app completely.      

Open the Run dialog by pressing Windows + R.      

Type or paste the following command and click OK:      

olk.exe --devtools      

The new Outlook will open (you may need to sign in), and the DevTools window will appear.      

In DevTools:       

Click Application on the toolbar.      

Clear local storage cache: Under Storage, find https://outlook.office.com., under Local Storage, right-click it, and select Clear.      

Clear cookies: Under Cookies, locate https://outlook.office.com., right-click it, and select Clear.   

Close the DevTools window.      

Once completed, the cache for the new Outlook will be cleared. Please note this process removes temporary files, including saved login credentials, so you may need to sign in again.     

After completing these steps, please verify them again in the New Outlook app. 

Option 3: Repair Outlook app  

This article provides further guidance on the topic: Repair an Office application - Microsoft Support 

Option 4: Reinstall Office apps   

Please uninstall Office apps, then reinstall them:      

Go to office.com > Apps > All apps > Install apps > Microsoft 365 apps > Apps & devices > Install Office.

As a moderator, I don't have the tools to investigate your specific account directly because this is a user-to-user support forum. Moderators and contributors, including external Microsoft employees, cannot directly intervene in Microsoft product features or access back-end systems. Our role is limited to providing technical guidance on reported issues, requests, or ideas. However, I will try my best to guide you as clearly as possible.    

I hope this information is helpful. If you have any questions or need further support, please don’t hesitate to reach out at any time. 

Thank you for your patience and understanding. 

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