When you review a document in Microsoft Word, comments can pile up quickly. Responding to each one takes time, especially when you need to rephrase an idea or provide a clear explanation. Copilot in Word now offers AI-generated reply suggestions directly inside comment threads. This article explains how to enable and use this feature, what it can and cannot do, and how to avoid common pitfalls.
The feature works by analyzing the comment text and the surrounding document content. Copilot then proposes one or more draft replies that you can insert, edit, or discard. You must have a Copilot for Microsoft 365 license and the latest Word desktop app or Word for the web. The feature is not available in Word for Mac or in older perpetual versions of Office.
This guide covers the exact steps to reply with AI suggestions, the prerequisites you need to check, and the limitations you should know before relying on the feature for critical communication.
Key Takeaways: Reply to Word Comments Faster With Copilot AI
- Copilot for Microsoft 365 license: Required for AI reply suggestions in comment threads.
- Word desktop or Word for the web: Feature works in both, but not in Word for Mac or Office 2019/2021.
- Reply button in the Copilot comment pane: Click to generate up to three draft replies you can use as-is or edit.
How Copilot Generates Reply Suggestions in Word Comments
Copilot in Word uses the Microsoft Graph and the language model to understand the context of a comment. When you click the Copilot reply button inside a comment thread, the system reads the comment text, the paragraph the comment is attached to, and the previous replies in the same thread. It then generates one to three short, actionable suggestions.
The feature is designed for common review scenarios: agreeing with a suggestion, asking for clarification, providing additional information, or marking a comment as resolved. Copilot does not generate replies that require external data, such as pulling numbers from a spreadsheet or fetching email content. It works only with the text available in the document and the comment thread.
Before you can use the feature, confirm these prerequisites:
- You have an active Copilot for Microsoft 365 license assigned to your user account.
- You are using Word Version 2402 (Build 17328.20000) or later on Windows, or the latest Word for the web.
- Your document is stored in OneDrive or SharePoint. Locally saved files do not support Copilot comment features.
- Your organization has enabled Copilot for Microsoft 365 in the Microsoft 365 admin center.
Steps to Reply With AI Suggestions in a Word Comment Thread
Follow these steps to generate and use Copilot reply suggestions in any Word comment thread.
- Open the document and locate the comment thread
Open your document in Word desktop or Word for the web. Scroll to a section that contains a comment. Click on the comment balloon icon in the margin to open the comment pane on the right side of the screen. - Click the Copilot reply button inside the comment
In the comment pane, look for the Copilot icon (a small sparkle) next to the reply text box. Click that icon. Copilot analyzes the comment and displays up to three suggested replies below the text box. - Select a suggestion or request a new one
Click any suggestion to insert it into the reply text box. If none of the suggestions fit, click the refresh icon next to the suggestions to generate a new set. You can repeat this step until you find a suitable draft. - Edit the suggestion before posting
Once the suggestion appears in the reply box, edit it as needed. Change the tone, add specific details, or remove parts that do not apply. Copilot does not automatically post the reply. - Post the reply
Click the Post button or press Ctrl+Enter to submit the reply to the thread. The reply appears in the comment thread with your name and the Copilot-generated content.
If you do not see the Copilot icon in the comment pane, verify that your document is saved to OneDrive or SharePoint. If the document is stored locally, save a copy to the cloud and reopen it. Also check that your Word version is up to date by going to File > Account > Update Options > Update Now.
Common Mistakes and Limitations When Using Copilot Reply Suggestions
Copilot does not generate replies for comments on tracked changes
If a comment is attached to a tracked insertion or deletion, Copilot may not offer suggestions. The feature works only on comments attached to stable, accepted text. To use it, accept or reject the tracked change first, then click the comment to refresh the pane.
Suggestions are based only on the comment and surrounding text
Copilot cannot reference other parts of the document, external files, or your email. If the comment asks for data that exists elsewhere, you must write the reply manually. The suggestions are most useful for acknowledging feedback, asking for clarification, or providing a brief explanation.
Reply suggestions are not available in Word for Mac or Word mobile
The feature is currently limited to Word desktop on Windows and Word for the web. Users on Mac, iOS, or Android cannot see the Copilot reply button. They can still read and post manual replies to the same thread.
Organizational policies may block Copilot in comments
Some administrators disable Copilot features for comments to prevent AI-generated content in internal reviews. If the Copilot icon does not appear after confirming all prerequisites, contact your IT admin to verify that the Copilot for Microsoft 365 service plan is enabled and that the comment-specific policy is not turned off.
Copilot Reply Suggestions vs Manual Replies: Key Differences
| Item | Copilot Reply Suggestions | Manual Reply |
|---|---|---|
| Generation speed | Instant after clicking the icon | Depends on your typing speed |
| Content source | Comment text and surrounding paragraph | Your knowledge and external data |
| Tone control | Limited to suggestions you can edit | Full control over tone and wording |
| Availability | Windows desktop and Word for the web | All Word platforms |
| Data privacy | Processed by Microsoft 365 Copilot | No AI processing |
You now know how to use Copilot reply suggestions in Word comment threads. Start by opening a document with active comments and testing the feature on a simple feedback comment. For more advanced review workflows, combine Copilot suggestions with the Compose button in the Copilot pane to draft longer responses. Remember that editing the suggestion before posting gives you full control over the final message.