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Dear @Fuller, Charlie (RC-US SI B OPS SOL EN DIG),
Thank you for reaching out to the Microsoft Q&A community. I understand that your OneNote notebook has stopped sharing with others, and I know how important it is to maintain a seamless collaborative environment. I am here to help you restore that access as quickly as possible.
Step 1: Verify Permissions in the Web Version
To determine if the issue is with the OneNote app or the underlying storage, please check the permissions online:
- Go to OneNote.com and sign in with your account.
- Open the notebook in question.
- Click on the Share button in the top-right corner.
- Select Manage Access. Ensure the individuals are still listed. If they are missing, please re-invite them here.
Step 2: Force a Manual Sync
If permissions look correct online but others cannot see your updates, the app may be hung:
- OneNote for Windows 10/Mac: Right-click the notebook name in the sidebar and select Sync > Sync This Notebook.
- OneNote (Desktop App): Go to File > Info > View Sync Status and click Sync Now.
Step 3: Clear Office Credentials (Windows)
If you receive a "User Canceled" or "Sign-in required" error that prevents sharing, your stored credentials might be corrupted:
- Close all Office applications.
- Open Control Panel > User Accounts > Credential Manager.
- Select Windows Credentials.
- Remove all credentials related to MicrosoftOffice16 or OneDrive.
- Restart OneNote and sign in again to re-establish the secure connection.
Step 4: Check for Shared Link Expiration
If you shared the notebook via a "Specific People" link, it is possible an expiration date was set:
- Right-click the notebook in your OneDrive or SharePoint folder.
- Select Manage Access.
- Check if the sharing links have expired or been deactivated and create a new link if necessary.
For more detailed walkthroughs on sharing and permission management, you can refer to the official Microsoft guide: How to share a OneNote notebook - Microsoft Support
Please let me know if you encounter a specific error code during these steps, and I will be happy to investigate further.
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