If you manage a busy inbox, tracking which emails still need a reply can be time-consuming. Outlook does not have a built-in filter that directly shows all unanswered messages. This article explains how to use Copilot in Outlook to find unanswered emails quickly using natural language queries. You will learn the exact prompts, the required setup, and the limitations of this feature.
Key Takeaways: Finding Unanswered Emails with Copilot in Outlook
- Copilot pane in Outlook: Use the prompt “Show me emails that I have not replied to” to list unanswered messages from the last 7 days.
- Copilot settings in Microsoft 365 admin center: Ensure Copilot is enabled for your tenant and that Exchange Online mailbox data is accessible for grounded responses.
- Search bar in Outlook: Use the query “IsRead:true AND NOT HasAttachments:true AND NOT From:me” as a manual alternative when Copilot is unavailable.
How Copilot Finds Unanswered Emails in Outlook
Copilot in Outlook uses natural language processing to interpret your request and then queries your mailbox data through Microsoft Graph. When you ask for unanswered emails, Copilot scans your inbox for messages where the sender is not you and where no reply exists in the conversation thread. The feature relies on the Exchange Online mailbox being indexed and accessible via Microsoft Graph. It does not use a dedicated “unreplied” flag but instead infers the reply status from the thread structure. This means the results depend on how well Copilot can parse your conversation history. For the feature to work, you must have a Copilot for Microsoft 365 license and be signed into Outlook with a work or school account.
Steps to Use Copilot to Find Unanswered Emails
- Open Outlook and activate Copilot
Launch Outlook on Windows, Mac, or the web app. Click the Copilot icon on the right side of the ribbon to open the Copilot pane. If you do not see the icon, go to View > Copilot and ensure the toggle is turned on. - Type the prompt for unanswered emails
In the Copilot pane, type the following prompt exactly: Show me emails that I have not replied to. Copilot will then scan your mailbox and return a list of messages that match this criteria. You can refine the search by adding a time frame: Show me unanswered emails from the past 3 days. - Review the results in the Copilot pane
Copilot displays a list of email subjects with sender names and dates. Click any subject to open the email in the main reading pane. If the list is too long, use the scroll bar or ask a follow-up question like Show only the ones from today. - Reply directly from the Copilot pane
While viewing an email opened from the Copilot results, click Reply in the reading pane. Copilot can also help draft a reply: click the Copilot icon in the compose window and select Draft with Copilot. Provide a brief instruction such as Thank the sender and confirm receipt.
If Copilot Returns Incomplete or Incorrect Results
Copilot shows emails I already replied to
Copilot may include messages where your reply was sent outside the main thread, such as a separate email with a different subject. To work around this, add the phrase excluding forwarded messages to your prompt. For example: Show me emails that I have not replied to, excluding forwarded messages. This reduces false positives.
Copilot returns no results even though I have unanswered emails
This usually happens when Copilot cannot access the full conversation history. Check that your mailbox is not set to archive items older than 30 days. Go to Outlook > File > Account Settings > Account Settings > Change > More Settings > Advanced and verify the mail retention policy. If items are archived, Copilot cannot scan them. Also confirm that the Copilot for Microsoft 365 license is assigned to your user account in the Microsoft 365 admin center.
Copilot says it cannot find unanswered emails in shared mailboxes
Copilot in Outlook currently supports only the primary mailbox of the signed-in user. It does not scan shared mailboxes, group mailboxes, or delegate mailboxes. If you need to find unanswered emails in a shared mailbox, use Outlook search with the query IsRead:true AND NOT HasAttachments:true AND NOT From:me after switching to that mailbox folder.
Copilot in Outlook vs Manual Search: Key Differences
| Item | Copilot in Outlook | Manual Outlook Search |
|---|---|---|
| Query method | Natural language prompt | Keyword syntax or search folders |
| Time range default | Last 7 days unless specified | All indexed items unless filtered |
| Shared mailbox support | Not supported | Supported after switching mailbox |
| False positive rate | Moderate due to thread parsing | Low with precise search syntax |
| License required | Copilot for Microsoft 365 | None |
Now you can use Copilot in Outlook to find unanswered emails by typing natural language prompts in the Copilot pane. Start with the prompt Show me emails that I have not replied to and refine it with a time range if needed. For more advanced filtering, combine Copilot with manual search folders or add the excluding forwarded messages modifier to your prompt. If Copilot cannot access a shared mailbox, switch to that mailbox first and use the manual search query IsRead:true AND NOT HasAttachments:true AND NOT From:me as a fallback.