How to Open Old OneNote for Windows 10 Notebooks in Microsoft 365

Old OneNote notebooks may be missing because they were never stored in OneDrive and exist only in the Windows 10 app cache, which OneNote 365 cannot load directly.

Check whether the notebooks exist in OneDrive

Before trying any migration, sign in to OneDrive on the web. Open the Documents folder, or use the search box to search for the notebook name.

• If the notebook appears in OneDrive, it is cloud-based and should be available to open from the newer OneNote app.
• If search returns nothing, the notebook may never have finished syncing to OneDrive.
• The expected result is a visible notebook in OneDrive that can sync normally.

OneDrive web → Documents folder.

Search by the exact notebook name in OneDrive.

What success looks like

The notebook appears online and can later open in OneNote 365.

When the notebook exists only in the Windows 10 cache

OneNote for Windows 10 creates a local cache when a notebook is opened. If nothing is in OneDrive, that cache may be the only remaining copy.

What is not supported

Syncing those cached notebooks back to OneDrive may fail. OneNote for Windows 10 also does not provide direct notebook export.

If the notebook is cache-only, OneNote 365 cannot simply load it from the cloud because there is no cloud notebook to open yet.

Copy content into a new cloud notebook

This is the source-backed recovery method when the old notebook is not available in OneDrive. Follow the order exactly and use Copy, not Move.

Create a brand-new notebook in OneNote for Windows 10

For each old notebook, create a new empty notebook and give it a different name to avoid confusion. This new notebook is the target that should sync to OneDrive.

Verification: open onedrive.live.com and confirm the newly created notebook appears there.

Copy sections from the old notebook to the new one

In OneNote for Windows 10, right-click each section in the old notebook and copy it to the new notebook. Do not use Move, because copying is the safer recovery path from a fragile cache-based source.

Expected result: copied sections begin appearing in the new notebook and sync to OneDrive.

If a section is unsynced, copy pages instead

Some sections may refuse to copy because they are marked as unsynced. In that case, create a new section with the same name inside the new notebook, then copy the pages from the old section into the new one.

Verification: refresh OneDrive and confirm the copied content becomes visible in the new notebook online.

Open the synced notebook in OneNote 365

After the new notebook is visible in OneDrive, start OneNote 365 and open that notebook there. This is the final migration check.

Success means the newly copied notebook opens in OneNote 365 and shows the sections or pages you transferred.

Verify sync status before you migrate

Check sync in OneNote for Windows 10

Open Settings in OneNote for Windows 10, then choose Sync. Review whether the notebook shows normal synchronization or any unsynced state.

If an error appears, note the exact message because it helps explain why the notebook is not reaching OneDrive.

Check Sync Status on the newer computer

In the newer OneNote app, right-click the notebook and select Sync Status. Look for unsynchronized items or related error messages.

Expected result: no unsynced warnings. If warnings remain, complete the copy-to-new-notebook method instead of waiting for a broken sync to repair itself.

What each check tells you

Confirm account and storage conditions

Use the same Microsoft account

Make sure the Microsoft 365 account and the OneNote for Windows 10 account are the same. If the accounts differ, the notebook may be syncing to a different OneDrive location.

Check OneDrive capacity, not just local disk space

Large free space on the laptop does not by itself guarantee notebook sync. The relevant limit for cloud notebooks is available OneDrive storage.

If OneDrive is empty, rebuild the notebook in the cloud first

The decisive check is whether the notebook still exists in OneDrive. If it does not, treat the old notebook as cache-only, create a new cloud notebook, copy sections or pages into it, then open that synced copy in OneNote 365.

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Use this only when direct syncing is not working and you can still access the notes on the older computer.

Install and open the desktop OneNote client

On the older computer, install the desktop OneNote app if it is not already available. Open OneNote for Windows 10 and the desktop client side by side if needed.

Manually copy notes into a new notebook

Create a new notebook in the desktop client and manually copy the notes into it. This gives you a notebook that the desktop app can work with directly.

Export and move the notebook package

In desktop OneNote, use File > Export and export the notebook as a OneNote package. Save it to removable storage, move it to the new computer, and import it into OneNote there.

Verification: after import, confirm the notebook opens and the expected pages are present.

Where WPS Office fits in

WPS cannot repair Microsoft-side OneNote sync, Microsoft account issues, OneDrive cloud state, licensing, or app-specific notebook controls. For that part of the problem, you still need Microsoft’s own OneNote and OneDrive workflow.

If your work around this migration also includes local documents such as DOCX, XLSX, PPTX, or PDF files, WPS Office is a free, lightweight option with a familiar interface, PDF tools, and WPS AI assistance for summarizing notes, rewriting text, or organizing exported content. Compatibility is strong for common Office files, but OneNote notebook syncing and Microsoft cloud notebook recovery are outside its scope.

Open Old OneNote for Windows 10 Notebooks in Microsoft 365 FAQs

What should I do if a section refuses to copy to the new notebook?

That usually means the section is unsynced. Create a new section with the same name in the new notebook, then copy the individual pages into it instead of copying the whole section.

Does free space on my laptop prove that notebook syncing should work?

No. Local disk space and OneDrive cloud storage are different checks. A laptop can have plenty of free space while OneDrive still lacks the capacity or state needed for notebook sync.

Where should old OneNote notebooks appear online?

They may appear in OneDrive, often under the Documents folder, or be found by searching for the notebook name.

What if the notebook is only in the OneNote for Windows 10 cache?

Create a new synced notebook, then copy sections or pages from the old notebook into the new one so it becomes available in OneNote 365.