Microsoft 365 Copilot Cannot Rewrite Selected Text in Word: Fix

You select a paragraph in Word, open Copilot, and click Rewrite. Nothing happens, or Copilot returns an error instead of a revised version. This problem usually occurs because of a conflict between Copilot and Word’s built-in Editor pane, a corrupt Normal.dotm template, or a missing Microsoft 365 update. This article explains the root causes and provides step-by-step fixes to restore Copilot’s rewrite functionality.

Why Copilot in Word Fails to Rewrite Selected Text

Copilot’s Rewrite command relies on two components working together: the text selection engine in Word and the Copilot service connected to Microsoft Graph. When you highlight text and click Rewrite, Word must first pass the selected content to Copilot’s API. If the Editor pane is open, Word prioritizes Editor’s analysis and blocks Copilot from reading the selection. This is the most common cause.

A second cause is a corrupted Normal.dotm template. This file stores default styles, macros, and some add-in settings. If it becomes damaged, Word may fail to register the selection event that Copilot listens for. Users running outdated Microsoft 365 builds (versions older than 2309) may also encounter this bug. Microsoft fixed the selection-handling issue in the September 2023 update (Version 2309 Build 16827.20130).

Copilot License and Service Status

Copilot Rewrite requires an active Copilot for Microsoft 365 license. If your license expired or was removed, the Rewrite button appears but does nothing. Check your Microsoft 365 admin center > Billing > Licenses to confirm the license is assigned to your user account. Also verify that the Copilot service is healthy by visiting the Microsoft 365 Service Health dashboard.

Steps to Fix Copilot Rewrite in Word

Follow these steps in the order listed. Test Copilot Rewrite after each step before moving to the next one.

1. Close the Editor Pane
   Open Word and go to the Review tab. If the Editor pane is open on the right side, click the Editor button again to close it. Select a paragraph and click Copilot > Rewrite. If it works now, the Editor pane was blocking the operation.
2. Restart Word in Safe Mode
   Press the Windows key, type winword /safe, and press Enter. Word opens without add-ins. Select text and try Copilot Rewrite. If it works, a third-party add-in is interfering. Disable add-ins one by one via File > Options > Add-Ins > Manage COM Add-ins > Go.
3. Delete the Normal.dotm Template
   Close Word. Press Windows+R, type %appdata%\Microsoft\Templates, and press Enter. Right-click Normal.dotm and rename it to Normal.old. Open Word — a fresh Normal.dotm is created. Test Copilot Rewrite. Your custom styles and macros will be reset.
4. Run Microsoft 365 Quick Repair
   Open Windows Settings > Apps > Installed apps. Find Microsoft 365, click the three dots, and select Modify. Choose Quick Repair and follow the prompts. Restart your PC and test Copilot Rewrite in Word.
5. Update Microsoft 365 to the Latest Build
   In Word, go to File > Account > Update Options > Update Now. After the update completes, restart Word and test Copilot Rewrite. The minimum build required is Version 2309 Build 16827.20130.
6. Repair Copilot Service Connection
   Press Windows+R, type outlook.exe /resetnavpane, and press Enter. This resets the Outlook navigation pane which shares Copilot authentication with Word. Then sign out of all Microsoft 365 apps and sign back in. Test Copilot Rewrite again.

If Copilot Still Has Issues After the Main Fix

Some failures require additional steps beyond the primary fixes. Each subsection below addresses a specific symptom.

Copilot Rewrite Button Is Grayed Out

A grayed-out Rewrite button means Copilot cannot detect a valid selection. Ensure you have selected at least one full sentence — Copilot ignores single words or empty spaces. Also check that your document is not in a restricted editing mode (Review > Restrict Editing > Stop Protection). If the document is protected, Copilot cannot read the selection.

Copilot Returns an Error Message

If you see an error like “Something went wrong. Please try again,” the issue is likely a network proxy blocking Copilot’s API endpoint. Verify that your firewall allows traffic to copilot.microsoft.com and all subdomains. Corporate VPNs may also interfere — try disconnecting from the VPN and testing again. If the error persists, clear the Microsoft 365 cache by closing all Office apps, then deleting the contents of %localappdata%\Microsoft\Office\16.0\OfficeFileCache.

Copilot Rewrite Changes the Wrong Text

This occurs when Word’s selection anchor is misaligned due to tracked changes. Turn off Track Changes (Review > Track Changes > Track Changes) before selecting text for Copilot Rewrite. After Copilot outputs the revised text, you can re-enable Track Changes to continue editing.

Copilot Rewrite vs Manual Rewrite: Key Differences

Item	Copilot Rewrite	Manual Rewrite
Trigger	Select text + click Rewrite in Copilot pane	Type or paste new text manually
Speed	Generates 3-5 options in 2-5 seconds	Depends on user typing speed
Tone control	Choose from Professional, Casual, or Concise	User controls tone directly
Formatting preservation	Preserves bold, italic, and list formatting	User must reapply formatting manually
Requires internet	Yes — Copilot service must be online	No

Now you can resolve Copilot Rewrite failures in Word by closing the Editor pane, resetting the Normal.dotm template, or running a Quick Repair. Test the feature after each step to isolate the cause. If you frequently use Copilot Rewrite, keep your Microsoft 365 build updated to avoid known bugs. As an advanced tip, create a keyboard shortcut for Copilot Rewrite by going to File > Options > Customize Ribbon > Keyboard Shortcuts > Customize and assigning a key combination to the CopilotRewrite command.