Yes, Excel supports real-time collaboration, allowing multiple users to edit a workbook simultaneously and add comments in a chat-style format directly within cells.

💬 Commenting Features in Excel

• Users can add threaded comments to individual cells.
• Comments support replies, enabling back-and-forth discussions.
• This is ideal for scenarios like forecast reviews, sales input, or team feedback.

🧭 How to Add and Reply to Comments

1. Open the shared Excel file in Excel for Microsoft 365 or Excel Online.
2. Right-click the cell where you want to comment.
3. Select “New Comment” (not “Note”) to start a thread.
4. Type your comment and click Post.
5. Others can click Reply to continue the conversation.

📚 Reference:

• Adding Comments and Notes in Excel