※一部リンクに紹介を含みます

Microsoft 365 Copilot Notebooks: How to Use Them for Focused Work (Step-by-Step)

Promotional image for the article ‘How to Use Copilot Notebooks (2025 Guide)’. Features a bold headline, a subheading about processing long prompts and multiple steps, and a browser-style window with the Copilot logo and a checkmark, all on a light blue background.
Promotional image for the article ‘How to Use Copilot Notebooks (2025 Guide)’. Features a bold headline, a subheading about processing long prompts and multiple steps, and a browser-style window with the Copilot logo and a checkmark, all on a light blue background.
PR

Copilot is not using your files? Don’t worry.

You added documents.
You gave clear instructions.

But Copilot still gives wrong answers… or ignores your files.

You are not alone.

This is a very common problem.

The good news is:

You can fix it easily with Copilot Notebooks.


Quick Answer (Read This First)

If Copilot is not using the right files:

  • You may have too many references
  • Your files may not be accessible
  • Your prompt may be unclear

Fix it like this:

  1. Keep only important files (5–15 is best)
  2. Make sure Copilot can access them
  3. Use clear instructions
  4. Use a Notebook (not normal chat)

What Are Copilot Notebooks? (Simple Explanation)

A Copilot Notebook is a focused workspace for one project.

Instead of using one long chat, you:

  • Add only the files you need
  • Keep everything in one place
  • Ask Copilot to use those files only

Think of it like this:

  • Chat = messy conversation
  • Notebook = clean project room

Why Normal Copilot Chat Fails

Many users try this:

  • Add many files
  • Keep chatting for hours
  • Mix different topics

Result:

  • Copilot forgets context
  • Answers become inconsistent
  • Files are ignored

PR

Why Notebooks Work Better

With Notebooks:

  • Copilot focuses only on selected files
  • Answers are more accurate
  • Long tasks stay organized

This is the key difference.


How to Create a Copilot Notebook (Step-by-Step)

  1. Open Microsoft 365 Copilot (web)
  2. Click Notebooks
  3. Select New Notebook
  4. Give it a clear name (project-based)

Example:

  • Website Content Project
  • Training Materials
  • Customer FAQ

Add References (Most Important Step)

This step changes everything.

Inside your Notebook:

  • Open References
  • Add your files

Common file types:

  • Word
  • Excel
  • PowerPoint
  • PDF
  • OneNote

Important Rule: Keep It Small

Big mistake:

Adding too many files

Copilot only uses about the first 100 references.

Best practice:

  • Start with 5–15 files
  • Add only important ones
  • Remove old or duplicate files

Why Copilot “Ignores” Your Files

This is the most important part.


1. Too many files

If you add too many files:

Copilot may ignore some of them.


2. Wrong file order

Important files added later:

May not be used first.


3. Permission problem

If Copilot cannot access a file:

It will NOT use it.


4. Unclear prompt

If your instruction is vague:

Copilot may use general knowledge instead.


How to Fix It (Simple Method)

  • Keep files limited
  • Add important files first
  • Check permissions
  • Be specific in your prompt

How to Write Better Prompts (Very Important)

Good prompts make a big difference.


✔ Basic pattern

“Using only the files in this notebook…”


✔ Example 1 (summary)

“Using only the notebook files, list the top 5 issues.”


✔ Example 2 (comparison)

“Compare these documents and show differences in a table.”


✔ Example 3 (content writing)

“Write a beginner-friendly article based only on these files.”


Key point:

Always tell Copilot where to look.


Pro Tip: Use Small Notebooks

Many people make this mistake:

One big notebook for everything.


Better way:

Create multiple small notebooks.

Example:

  • FAQ notebook
  • Training notebook
  • Report notebook

Result:

  • Better accuracy
  • Faster answers
  • Less confusion

Real Use Cases (Simple Ideas)

You can use Notebooks for:


✔ Documentation

  • Combine old files
  • Create clean guides

✔ Meetings

  • Add notes
  • Get action items

✔ Training

  • Create lessons
  • Generate quizzes

✔ Projects

  • Track progress
  • Summarize updates

When Notebooks Don’t Work

Sometimes the problem is not your setup.


✔ If Copilot worked before

It may be a temporary issue.


✔ If it fails everywhere

It may be a Microsoft issue


In that case:

  • Wait a bit
  • Try again later

Final Tip

If Copilot is not using your files:

Don’t add more files.
Don’t make it more complex.

Make it simpler.

  • Fewer files
  • Clear instructions
  • Small notebooks

Conclusion

Copilot Notebooks help you:

  • Stay focused
  • Get accurate answers
  • Avoid confusion

If Copilot feels messy:

Notebooks are the solution.

Related Articles

Copilot Not Responding? M365 Feels Slow? Edge Keeps Crashing?

How to Use Microsoft Office for the Web for Free (Word, Excel, PowerPoint)