Automatically pastes selected email content from Outlook on the web into M365 Copilot side panel and optionally sends it with Enter.
Users
121
+6 in 30 days
Rating
0.0 / 5
unchanged in 30 days
Ratings
0
0 in 30 days
Store rank
#79K
#66K among extensions
Version
1.0.1
updated 11 Nov 2025
Users
monthly, 11 months
Latest, 18 Oct 2026:121 usersMove the mouse over the chart for any month
Ratings count
monthly, 11 months
Latest, 18 Oct 2026:0 ratingsMove the mouse over the chart for any month
The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.
About Outlook Copilot Reply Assistant with M365 Copilot
# Outlook Copilot Reply Assistant with M365 Copilot
A Chrome extension that efficiently creates email replies in Outlook on the web by leveraging M365 Copilot.
## 📖 Introduction
Composing business email replies is a time-consuming task. This extension bridges Outlook on the web and M365 Copilot, enabling you to send received email content to Copilot with a single click and generate appropriate reply text.
**Ideal for:**
- Professionals who need to respond to large volumes of emails daily
- Users who want to minimize time spent composing business emails
- Those looking to streamline email workflows with M365 Copilot
- Organizations seeking to standardize signature and salutation formats
**Features:**
- 🚀 **One-Click Operation** - Launch Copilot instantly from the right-click menu
- ⚡ **Fast Processing** - Auto-paste and send in 3-6 seconds
- 🌐 **Multilingual Support** - Available in Japanese and English
- 🎨 **Customizable** - Freely edit prompt templates
- 🔒 **Privacy Protected** - Email content is never stored
## 📋 Prerequisites
To use this extension, you need the following:
### Required
- **Google Chrome** or **Microsoft Edge** browser
- **Microsoft 365** account (Business or Enterprise)
- **M365 Copilot** license
- Access to **Outlook on the web**
### Verification Steps
1. Log in to [Outlook on the web](https://outlook.office.com/)
2. Check if the "Copilot" icon appears on the right side of the mail screen
3. Click the Copilot icon to verify that the Copilot pane opens
> **Note**: M365 Copilot is a paid service requiring a license. If unavailable, please contact your organization's administrator.
## Key Features
### 🎯 **Simple Operation**
- Select email body text
- Choose "Draft Reply with Copilot" from the right-click menu
- M365 Copilot opens automatically with custom prompt and email content pasted
- Optional auto-send functionality
### 🤖 **Smart Prompts**
- Business email-specific prompt templates
- Automatic sender signature extraction and salutation conversion
- Auto-configured personal signatures
- Efficient generation of reply content only
## Usage
### 📧 **Basic Usage**
#### Step 1: Open Email
1. Access [Outlook on the web](https://outlook.office.com/)
2. Open the email you want to reply to
#### Step 2: Select Email Body
3. Drag your mouse to select the portion of the email body you want to reference
- Including sender name and signature generates more appropriate replies
- You can also select only necessary information
#### Step 3: Execute Extension
4. **Right-click** on the selected text
5. Choose **"Draft Reply with Copilot"** from the menu
#### Step 4: Copilot Auto-Execution
6. M365 Copilot side panel opens automatically
7. Prompt and email content are pasted automatically
8. Auto-sent based on settings (Default: ON)
#### Step 5: Enter Reply Content
9. Respond to Copilot's questions with your desired reply content
- Example: "Acknowledge receipt and inform that I'll handle it next Monday"
10. Copilot generates an appropriate business email reply
#### Step 6: Review and Use Reply
11. Review the generated reply text
12. Edit as needed
13. Copy and paste into Outlook's reply screen
### ⚙️ **Customization**
#### Opening Options
- Click the extension icon in the browser toolbar
- Click the "Options" button
#### Customizable Settings
1. **Auto-Send Settings**
- ON: Automatically sends Enter key after pasting prompt (Default)
- OFF: Paste only, manual send required
2. **Prompt Template**
- Edit default prompts
- Reset with "Reset to Default" button
- Different templates for Japanese and English
3. **Language Settings**
- Switch between Japanese / English
- Auto-detects browser language (first time only)
- Manually changed settings are preserved
### 💡 **Usage Tips**
- **Selection Tips**: Including sender's signature (e.g., "John Doe, ABC Corporation") enables automatic conversion to proper salutations like "Dear Mr. Doe"
- **Prompt Customization**: Specify reply tone and format in prompt templates
- **Multiple Emails**: Simply repeat the same operation for consecutive replies
- **Custom Prompts**: Customize prompts to match your organization's writing style and signature rules
### 🌐 **Supported Sites**
- `https://outlook.office.com/*`
- `https://outlook.office365.com/*`
- M365 Copilot iframe (auto-detected)
## Privacy
- **Data Destination**: Microsoft 365 Copilot only
- **Local Storage**: Prompt templates and settings only
- **Email Content**: Never stored
- **External Services**: None used
## Troubleshooting
### 🔍 **Common Issues**
**Q: Right-click menu doesn't appear**
- A: By design, only displayed on Outlook domains
**Q: Copilot doesn't open**
- A: Verify you're logged into Microsoft 365
**Q: Doesn't work after the first time**
- A: Reset settings with `window.resetToDefaults()`
**Q: Slow performance**
- A: Latest version is significantly optimized
## Permissions
This extension requires the following permissions:
- **contextMenus**: Create right-click menu items
- **storage**: Save user preferences (prompt templates, settings, language)
- **tabs**: Cross-tab messaging and Copilot tab management
- **webNavigation**: Detect and communicate with Copilot iframes
All permissions are strictly necessary for core functionality. No data collection or tracking occurs.
## Support
### 💼 Enterprise Usage
We offer paid support for enterprise deployments and customization.
**Contact:**
- Website:http://www.satorifactory.jp/
- Developer: Satori Factory
### ☕ Support & Donations
If this extension is helpful, please consider supporting continued development.
(https://www.buymeacoffee.com/satorifactory)