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How Can I Fix OneNote Incomplete Sync with Error Code 0xE00009C8 bb0ur issue?

Ever had OneNote just… stop syncing? Frustrating, right? Well, that sync error code, 0xE00009C8, could be the culprit. It’s like a block in the road—OneNote can’t talk to the cloud, so your notebooks just sit there, not updating. Why does it happen? Maybe it’s your internet. Maybe your cache is throwing a tantrum. I’ll walk you through how to fix it.

The detail error message as below:

OneNote can’t sync your notes right now. We’ll keep trying. (Error code: 0xE00009C8 bb0ur)

How Can I Fix OneNote Incomplete Sync with Error Code 0xE00009C8 bb0ur issue?

Here’s how you can solve it step by step.

Solution 1: Manually Sync Your Notebook

Sometimes, OneNote is just too lazy to sync. Think of it like shaking a vending machine when your snack gets stuck. You’re giving it a little nudge. Manually syncing forces the app to reconnect with the cloud. Do it like this:

  1. Click File from the Home tab.
  2. Tap View Sync Status.
  3. Click Sync Now or Sync All at the top-right.

This is your first try. Does the error still show up? If yes, we keep going.

Solution 2: Check Microsoft’s Server Status

Let’s say you’ve done your part. But what if the problem isn’t on your end? It’s like calling someone whose phone is off—you’ll never get through. Check if Microsoft’s servers are down. Head over to Office Server Status.
If their servers are up, great. If not, no point pulling your hair out—you just wait. You can even check the Microsoft forums to see if others are stuck too.

Solution 3: Log Out, Log Back In

Here’s a quick reset trick. Imagine leaving the room and coming back in—sometimes it refreshes your brain. Signing out and signing back into OneNote refreshes its connection to the cloud. It’s like starting over with a clean slate.

  1. Click your profile icon.
  2. Hit Sign Out.
  3. Sign back in using your credentials.

If the problem is something as simple as expired authentication tokens, this should solve it.

Solution 4: Clear OneNote’s Cache

The cache is like your phone’s memory—it stores things temporarily so your app runs faster. But, when it gets junked up, it slows everything down or stops syncing altogether. You’ve got to clear it out:

  1. First, close OneNote.
  2. Press Windows + R on your keyboard.
  3. Type: C:\Users\YourUsername\AppData\Local\Microsoft\OneNote\16.0\cache (Swap out YourUsername with your real one and 16.0 with the version of OneNote you use.)
  4. Select all files and delete them.

Once you’ve done that, restart OneNote. See if the sync error is gone. If it’s still sticking around, don’t worry—we have one more step.

Solution 5: Reinstall OneNote

If clearing the cache didn’t work, it’s like trying to fix a rusty machine. Sometimes, you just need a new one. Reinstalling the app can get rid of corrupted files that might be messing things up. After you reinstall, it’s like getting a fresh notebook—everything should sync properly.

Sync issues can be annoying, but fixing them is usually simple. Just take these steps one by one. If one doesn’t work, move on to the next. You’ll get that pesky error out of the way and have everything updating like clockwork. And remember: sometimes the cloud is the problem, not you!