How to Fix OneNote Responding and Crashing as Well as Not Syncing

To fix OneNote responding and crashing as well as not syncing, first identify the correct account, file, device, or service context. The steps below isolate the cause and apply a result you can verify.

Identify the Message, Account, and Destination

Start by confirming whether the symptom affects one file, one device, one account, or the service itself. That distinction determines whether the next action belongs in the desktop app, the web portal, or an administrator console.

Quick Outlook Workflow

First, remove special characters from names. Next, rename the affected section group and any sections under it, and verify the final state before changing any backup or secondary account.

Why This Can Happen

• The wrong personal, work, school, billing, or administrator account is selected
• A license, permission, connection, file rule, or local setting does not match the requested action
• Cached credentials or an incomplete synchronization or activation state hides the current server status
• The Microsoft service or application requires a more specific control than a generic restart

How to Fix OneNote Responding and Crashing as Well as Not Syncing

1. Remove special characters from names
2. Rename the affected section group and any sections under it
3. Remove special characters such as + and any other non-alphanumeric symbols from
4. Use only letters, numbers, spaces, and basic punctuation
5. Confirm that the notebook now syncs without showing error 0xE0000644 9zu13 and that OneNote no longer hangs or crashes when syncing that notebook

After the final step, reopen the affected app, portal, file, or account page and confirm the exact status or behavior described in the title.

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Test advanced macros, add-ins, external connections, sensitivity controls, and Microsoft-only cloud integrations on a copy before moving a critical workflow.

Practical Checks That Prevent a Repeat

• Record which account, app, and file owns the workflow
• Keep a verified backup before removing access, changing ownership, or replacing a local file
• Apply high-impact changes to one test item or user before expanding the scope
• Save confirmation numbers, dates, and screenshots of the final settings when they affect billing, security, or permissions

Frequently Asked Questions

Why should I remove special characters from names?

Remove special characters from names. The available Send to OneNote behavior depends on Outlook and OneNote versions. Test one message first, then confirm whether each selected email creates a page or combines content.

What should I check after I rename the affected section group and any sections under it?

Verify sender, recipients, sent date, subject, body, attachments, and the destination notebook or section. Confirm the account type, product version, ownership, and permissions before assuming the control is unavailable.

What result should I expect after I remove special characters such as + and any other non-alphanumeric?

Not every Outlook voting or actionable-message workflow prevents a later change. The sender must use the capabilities supported by that message type or form. Keep the relevant backup or confirmation until you have checked the result.

How can I confirm that the steps to fix OneNote responding and crashing as well as not syncing worked?

Confirm that the notebook now syncs without showing error 0xE0000644 9zu13 and that OneNote no longer hangs or crashes when syncing that notebook. Reopen the affected app or portal and confirm that the expected status persists.