Copilot Notebooks Is Microsoft's Answer to NotebookLM. For Enterprise Teams, It's the Better Choice.
Google's NotebookLM got a lot of attention for a reason. It proved that grounding AI in a specific set of sources, rather than letting it roam the open web, produces dramatically more useful output. Less diverging content that isn't in your focus. Actual answers to specific questions about specific documents in the context of whatever it is you are trying to accomplish.
Microsoft watched that response and built something structurally similar inside Microsoft 365. Copilot Notebooks have been quietly maturing for a year and just received a significant update, including a new three-column layout now generally available across the M365 Copilot app and in OneNote.
What Copilot Notebooks Actually Are
A Copilot Notebook is a persistent workspace where you pull in a curated set of reference materials and Copilot reasons exclusively over those. You do your work and the answers stay grounded in what you've provided. Just those sources.
The updated experience brings references, a Copilot chat pane, and Copilot Pages into a side-by-side three-column layout. You can now work with Copilot while working on your page at the same time. There's also a new Overview page that auto-summarizes your references and surfaces key themes on demand, and Quick Create options that let you turn references into drafts, audio overviews, flashcards, and other pieces of content. I know my kids would love to automate their flashcard creation!
For cloud-stored files, there's no manual upload step. A reference link to a SharePoint doc stays live. As that doc changes, the Notebook picks it up. This is big so you don't end up with multiple sources of truth across different resources.
Where Microsoft Has an Edge Over NotebookLM
NotebookLM is excellent for personal research. It's fast, clean, and good at surfacing patterns across unstructured content. But it operates outside the enterprise permission model. You're uploading documents into Google's infrastructure with no awareness of your org's access controls, sensitivity labels, or data residency requirements.
That should matter a lot to your business. Not just in regulated industries and enterprises with actual data governance postures, it should matter to all businesses. There are going to be many examples of AI burning a business on their IP or private data. Take the steps so you aren't one of them. "just paste it into the AI" is not a real option. Copilot Notebooks live inside the Microsoft 365 trust boundary. Permissions, compliance policies, and sensitivity labels apply. Shared notebooks respect your company's access controls. You can collaborate on a notebook with a team and trust that the content stays where it belongs.
That's the specific thing that makes the enterprise deployment conversation different from anything NotebookLM or other commercial producs offer. Yes, sometimes that means their slightly behind the "latest tech" curve, but it's a necessary tradeoff for security.
Who This Is Actually For
The use case that makes the most sense: long-running projects with multiple contributors and a growing body of source material.
Think about a strategic planning cycle where inputs arrive over weeks across decks, meeting notes, and docs. Or a client engagement where your team is creating materials into a coherent point of view. Or a regulatory project where you need to reason across policy documents, internal controls, and audit records on a recurring basis.
These are not one-off chat tasks. They're situations where a persistent, shared workspace with grounded AI actually changes the workflow. Right now, most teams handle this manually: someone maintains a master doc and pastes it into chat threads repeatedly. In reality, most are still using file shares.
For individual knowledge workers, the Audio Overview feature stands out. Being able to convert a dense set of source materials into a synthesized spoken overview is a real productivity gain, especially for busy executives who process content more effectively that way. A nice, friendly, 30 second "this is what this is" type audio recording is excellent. But still, it's not exactly what everyone reaches towards just yet, but we will get there.
Adoption remains a real challenge
You've heard me say this in most things. We have to focus on adoption through proper organizational change management. I've seen strong Copilot rollouts where the most capable features go unused because people never find the deeper tools. Notebooks require a behavior change as well. People need to start thinking in terms of "I'm starting a project, I should create a notebook" rather than asking a one-off question. A tactic here would be to include Notebooks in your existing project or Teams creation workflow. Have a team test their benefit and make a broader decision to include them or not based on your results. That way, we avoid separate work streams being created.
Should You be Adding Notebooks to Your Rollout?
Yes, with clear expectations. Copilot Notebooks is a step forward for organizations that are already invested in M365 Copilot and looking for more structured ways to work with AI on ongoing projects. It is not yet the polished, intuitive product that NotebookLM is for personal use. The feature set is broader but the experience is less refined. Give it two or three more release cycles and see where it goes. I love the progression here though!