What Gets Removed and What Doesn’t Overview
Deleting things in Microsoft Copilot can feel confusing because not everything lives in the same place.
Chats, prompts, instructions, pages, notebooks, and agents are all handled differently.
Deleting one does not automatically delete the others.
This post explains exactly what gets deleted in Copilot, what does not, and where deletion must happen.
Chat History vs Files vs Memory (The Model That Works)
Use this simple model as you read:
- Chat is personal and disposable interaction history
- Prompts are saved copies that can be personal or shared
- Pages and Notebooks are real files with storage and permissions
- Agents have their own configuration and lifecycle
- Deletion must happen where the content was created
1. Deleting Copilot Chat History – Single Chat Session
This deletes one Copilot chat conversation from your chat list.
A chat includes:
- the prompt you typed
- the response Copilot returned
Chats can be created in:
- Copilot Chat
- Word
- PowerPoint
- Outlook
- Excel
- OneNote
- Loop
What It Does NOT Do
- Does not delete chats for other people
- Does not delete saved or shared prompts
- Does not delete Copilot Pages or Notebooks
- Does not delete files created from the chat
How-To
- Open Copilot
- Find the chat in your history
- Select More options (three dots)
- Choose Delete
Key Takeaway
Deleting a single chat only removes that conversation from your view.
2. Delete All Copilot Chat History Activity
Copilot chat history includes all prompts and responses created when you use Copilot across Microsoft 365 apps.
This includes Copilot interactions in:
- Copilot Chat
- Word
- PowerPoint
- Outlook
- Excel
- OneNote
- Loop
When you delete Copilot activity history, you are erasing stored interaction records. This means what you asked Copilot and what Copilot answered.
What It Does NOT Do
- Does not delete Copilot Pages or Notebooks
- Does not delete chats stored inside Pages or Notebooks
- Does not delete Word, Excel, or PowerPoint files
- Does not remove saved, shared, or scheduled prompts
- Does not affect chats created inside agents
What It Does (How-To)
- Click your profile picture
- Choose View account
- Go to Settings & Privacy
- Select Privacy
- Choose Copilot Activity History
- Delete the activity
Important notes:
- Once deleted, chats are permanently removed
- There is no recycle bin
- There is no secondary holding place like SharePoint or OneDrive
Key Takeaway
Deleting all Copilot chat history clears interaction records only, not stored content.
3. Can You Delete an Individual Copilot Response?
Many users want to remove a single Copilot response without deleting the entire chat.
At this time, Microsoft Copilot Chat does not reliably support deleting an individual response within a conversation.
Some online resources suggest this is possible, but they often:
- refer to other AI tools
- describe older or experimental interfaces
- confuse document editing features with chat behavior
What You Can Do Instead
Option 1: Delete the entire chat
- Removes all prompts and responses in that conversation
Option 2: Use Temporary Chat
- Designed for one-time or sensitive conversations
- Nothing is saved to chat history
- Useful for decluttering or testing prompts
What Is NOT Supported
- You cannot delete just one Copilot reply
- There is no “remove response” option in Copilot Chat today
Key Takeaway
If you only want to remove one response, Temporary Chat is the correct workaround.
4. Deleting Saved, Shared, and Team Prompts
Prompts can be saved:
- for yourself
- shared with others
- shared with a team
Once a prompt is shared, there is no owner delete.
What “No Owner Delete” Means
- When you share a prompt, others receive their own copy
- Deleting your copy does not delete theirs
- Copilot does not track one central version
This is intentional and prevents unexpected data loss.
What It Does NOT Do
- Does not remove the prompt from other users
- Does not cancel scheduled prompts for others
How-To
To remove a saved or shared prompt:
- Open Prompt Gallery
- Select Your Prompts or Team Prompts
- Find the prompt
- Select More options (three dots)
- Choose Remove from Saved or Remove from Team
Best Practice
If a prompt is outdated or replaced:
- Tell others to delete it
If you modify a prompt:
- Resave it
- Reshare it
- Delete the original
- Communicate the change
Key Takeaway
Shared prompts require communication, not just deletion.
5. Removing “Remembered” Chat Instructions or Behaviors
Copilot Chat instructions are not in one place.
Where Instructions Can Live and How to Remove Them
- Global Chat instructions: Edit the Chat Settings
- Single Chat instructions: Start a new chat or override instructions
- Saved or scheduled prompts: Delete or update the prompt; Reshare if others use it
- Pages or Notebooks: Edit or delete the instruction directly
- Custom agents: Update the instructions in the agent configuration
What It Does NOT Do
- You cannot ask Copilot to “forget forever”
- Deleting chat history alone does not remove instructions elsewhere
How To
- Select More options (three dots) from the top right menu
- Select Settings and then, Personalization
- Select Edit instructions under custom instructions
Key Takeaway
Copilot is flexible with deleting chats and chat’s memory instructions, as long as you know where to find them. Give this post a “thumbs up” if you find it helpful.
6. Deleting Copilot Pages and Notebooks (and Their Chats)
Copilot Pages and Notebooks are stored content and may contain chats.
Chats associated with Pages and Notebooks are not deleted when you delete Copilot chat history.
Copilot Pages
Pages can be deleted from Copilot Chat Home.
How to delete:
- Go to the Library from the left navigation
- Select Pages
- Find your Page
- Delete
Notes:
- The Library shows Pages modified in the last 30 days
- Use search to find older Pages
Deleting a Page removes:
- the Page
- the chats stored with it
Copilot Notebooks
Copilot Notebooks feature is available to users with a Microsoft 365 Copilot premium license.
How to delete:
- Select All Notebooks from the left navigation
- Hover over a notebook that you want to delete
- Select More options (three dots)
- Select Delete
Notes:
- All chats in the notebook are removed
- Linked files and pages are not deleted
- Linked items are marked with a link (–) icon
Notebook Audio Overview:
- Available for 30 days
- Automatically deleted after 30 days
- Can be manually deleted:
- Open the notebook
- Under Created Content, find the MP3
- Select More options
- Delete
Key Takeaway
Deleting chat history does not touch Page or Notebook chats.
You must delete the Page, Notebook, or chats directly.
7. Deleting Chats in Prebuilt Agents
Prebuilt agents generate chats within their own experience.
What Applies
- Deleting Copilot chat history removes your interaction records
- It does not reset agent behavior
- It does not delete files, Pages, or Notebooks used by the agent
Note: Users are unable to delete prebuilt agents
How to
- Follows the same steps as deleting a single chat
- Unable to delete chats from the prebuilt agent’s History section.
Key Takeaway
Agent chats follow the same chat deletion rules, but agent configuration remains unchanged.
8. Deleting Custom Agents Chats
Custom agent chats are stored under the Chat section in Copilot Chat’s left navigation.
How To
1. Follow the same steps as deleting a single chat
Note
- Currently, chat history does not appear on the custom agent home page like prebuilt agents.
Deleting a Custom Agent Entirely
Custom agents have their own instructions and knowledge sources.
What It Does
- Deleting a custom agent removes:
- the agent
- its instructions
- its configuration
What It Does NOT Do
- Does not delete files used as knowledge sources
- Does not delete SharePoint or OneDrive content
- Does not delete Copilot chat history
How To
- From the Copilot Chat left navigation, hover over the agent and select Edit
- Located in the top right corner, select More Options (three dots)
- Select Delete
Key Takeaway
Agents must be deleted or edited at the agent level.
9. Local and Stored Files (Deletion Reminder)
Local and stored files in OneDrive or SharePoint are not affected when a Copilot chat is deleted.
To remove a file, you must delete it from its storage location.
Final Takeaway
Copilot deletion is layered by design.
- Chats are interaction records
- Prompts are copied when shared
- Instructions live where they were created
- Pages and Notebooks are stored content
- Agents have their own lifecycle
Once you delete content at the correct layer, Copilot behaves predictably.
Now, go and work your magic.
