How to Use Copilot in Outlook to Find Action Items in Email Threads

You receive dozens of emails daily, and many contain tasks buried inside long threads. Manually scanning each message to find what you need to do wastes time and risks missing important requests. Copilot in Outlook can read an entire email thread and summarize the action items assigned to you or others. This article explains how to use Copilot to extract action items from any email thread in Outlook.

How Copilot Identifies Action Items in Outlook

Copilot uses Microsoft Graph to read the content of email threads you select. It analyzes the text for language that indicates a request, deadline, or assignment. Phrases like “please send”, “by Friday”, “can you review”, and “let me know” are flagged as potential action items. Copilot then groups these items by assignee and date.

Before using this feature, you need an active Microsoft 365 Copilot license. Your admin must also enable Copilot in Outlook through the Microsoft 365 admin center under Settings > Org settings > Copilot. The feature works in Outlook on the web, the new Outlook for Windows, and the Outlook desktop app included with Microsoft 365.

Steps to Find Action Items in an Email Thread

Follow these steps to extract action items from any email thread in Outlook.

1. Open the email thread
   Double-click the email thread in your inbox to open it in a separate window. Copilot works best on threads with at least three messages. Single emails may not contain enough context for action item detection.
2. Open the Copilot pane
   On the Home tab in the ribbon, click the Copilot icon. The Copilot pane opens on the right side of the window. If you do not see the icon, check that your Microsoft 365 Copilot license is active.
3. Click Summarize
   In the Copilot pane, click the Summarize button. Copilot reads the thread and displays a summary. The summary includes a section called “Action items” with bullet points for each task found.
4. Review the action items
   Scroll through the summary. Each action item shows the task description, the person assigned, and the deadline if mentioned. Click any item to open the specific email where the task was requested.
5. Use the compose box for custom queries
   In the Copilot pane, type “Show action items for me” or “List all tasks from this thread” in the compose box at the bottom. Press Enter. Copilot returns a refined list filtered to your specific request.

Using Copilot Chat to Find Action Items Without Opening a Thread

You can also use Copilot Chat in Outlook to search for action items across multiple threads. This method is faster when you need a consolidated view of all pending tasks.

1. Open Copilot Chat
   In Outlook, click the Copilot icon in the top-right corner of the window. The Copilot Chat pane opens.
2. Type a query with @mention
   Type “@thread show action items from my last 10 email threads” or “@thread list all tasks assigned to me this week”. The @thread keyword tells Copilot to search the current mailbox.
3. Review the results
   Copilot displays a list of action items. Each item includes the thread subject and a link to open the thread. Click the link to see the original email context.
4. Refine the query
   If the list is too long, add filters. For example, type “@thread action items with deadline before next Friday”. Copilot narrows the results based on date.

Common Mistakes and Limitations

Copilot does not find action items in short threads

Copilot requires at least three messages in a thread to reliably detect action items. For threads with only one or two messages, use the compose box and type “What tasks are mentioned in this email?” Copilot will still attempt to find action items, but the results may be incomplete.

Action items are not assigned to anyone

If the thread uses vague language like “we need to update the report”, Copilot cannot determine who is responsible. To improve results, reply to the thread with a clear assignment. For example, “John will update the report by Thursday.” Copilot will then assign the action item to John.

Copilot returns no action items at all

This usually happens when the thread contains no explicit requests or deadlines. Check that the thread includes phrases like “please do”, “send me”, or “complete this”. If not, Copilot will not generate action items. You can still use the Summarize function to get a general summary of the thread.

Copilot shows action items from the wrong person

Copilot may misinterpret pronouns. A message saying “He needs to approve the budget” may be assigned to the sender instead of the person mentioned. To fix this, use a more specific query like “Show action items assigned to Sarah” to override the automatic assignment.

Copilot in Outlook vs Manual Search: Key Differences

Item	Copilot in Outlook	Manual Search
Time to find tasks in a 10-message thread	5 to 10 seconds	2 to 5 minutes
Accuracy for assigned tasks	High when clear language is used	Dependent on user scanning ability
Ability to filter by date	Yes, with natural language queries	No, requires manual reading
Works across multiple threads	Yes, with @thread queries	No, open each thread separately
Requires Copilot license	Yes	No

Copilot saves significant time when you need to process multiple threads quickly. Manual search remains available for users without a Copilot license, but it does not offer the same speed or filtering capabilities.

You can now use Copilot in Outlook to extract action items from email threads in seconds. Start by opening a thread and using the Summarize button. For a broader view, use Copilot Chat with @thread queries to find tasks across your entire inbox. Try combining the Summarize function with custom queries to filter action items by person or deadline. This approach reduces the time you spend managing email tasks by more than half.