How to synch one note?

Hello,

Thanks for getting back to me so quickly.

The 'lost' notebook refers to the content that hasnt been synched - I can see it open etc but it says 'content not yet available' but it never loads. Really fustrating as this is weeks worth of work. However my main concern is that the other books now have a triangle with exclaimation mark next to them and wont synch. But when I check on like, some edits are visible (just much slower than usual) so i dont know if this is a fault. After loosing one notebook, I am concerned about loosing more.

There are no error codes that I can see. My one note version is 16.102. My macOS is 15.6.1. I have over 300GB storage space available. I have deleted and reinstalled the app atleast 3 times, and have also restarted my computer. I have exams in 3 weeks so dont have much time but also dont want to loose work.

Thank you

Hi Georgia Fearon,

My apologies for the delay in response.

Thanks for the update, it really helps narrow things down. The absence of visible error codes is not uncommon, and we can proceed with further investigation. Please be assured that such synchronization issues frequently occur with shared or extensive notebooks, particularly those linked to university accounts, and they are typically resolvable without data loss. This often means the content's stuck in a sync loop, maybe from another device or a network fluctuation. Here's what to try:1. Initiate a comprehensive synchronization: Navigate to File > View Sync Status. Click Sync All, even in the absence of error codes. If the process stalls, close the notebook via Notebooks > Close This Notebook, exit OneNote, relaunch the application, and reopen the notebook from File > Open.

1. Access through the web interface or an alternative device: Sign in to onenote.com using your university account. If the content appears, duplicate any unsynchronized pages to a new section or notebook (right-click > Move or Copy). Subsequently, in the macOS application, close the affected notebook and reopen it from the web version by selecting Open in OneNote. This approach often resolves synchronization delays.
2. Relocate the affected content to a new section: If specific pages display the "not available" message, right-click the page tab and select Move or Copy to transfer it to a new section within the same notebook. Once copied, delete the original page if possible. For the entire notebook, consider creating a new one and migrating sections accordingly.
3. Inspect via OneDrive: As OneNote data is stored in OneDrive (associated with your university account), visit onedrive.com and locate the notebook file (typically a .one file or folder in Documents/NotebookName). Attempt to open it directly. If corruption is suspected, right-click the file and select Version history to restore a prior version.

Regarding the Exclamation Mark Triangles and Delayed Synchronization on Other Notebooks. These indicators suggest an underlying synchronization error, even without displayed codes.

1. Hover and check anyway: Mouse over the triangle—sometimes the code pops up after a sec. If not, in View Sync Status, look for any hidden details.
2. Sign out and back in: Go to OneNote > Sign Out, quit the app, restart your Mac, then sign back in with your university credentials. This resets the auth token and often fixes account glitches.
3. Thorough cache clear (beyond reinstall): Reinstalls don't always nuke everything. In Finder, hold Option > Go > Library, then trash these:
   • ~/Library/Containers/com.microsoft.onenote.mac (whole folder if possible).
   • ~/Library/Group Containers/UBF8T346G9.Office/OneNote (look for cache files). Quit OneNote first, and back up if you're worried. Reopen and sync.

If this is a shared notebook, loop in your IT team, they might spot quota limits or permission changes.

Appreciate you sticking with me, Hope this information will help clear things up.