This is because these error codes indicate that OneNotes servers are experiencing high traffic volumes.

In other words, too many users are using OneNote, and the servers cant respond promptly.

Dont exit the app.

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Wait 5 or 10 minutes, and relaunch OneNote.

Dont panic either; you wont lose your notes.

While youre waiting, OneNote will constantly take a stab at reach the servers to sync your notes.

onenote sign out

Eventually, the servers will respond, and the app will sync the notes.

For greater peace of mind, it’s possible for you to alsotake a screenshotof your notes.

Ideally, you should sign off of your account before switching to a different app version.

In this manner, youll refresh the connection between your account and OneNotes servers.

If you havent completely unplugged your modem in a long time, go ahead and disconnect the power cable.

Wait one or two minutes, and then power up your web link devices.

Additional Solutions

We published many guides on how to fix OneNote sync issues.

Check the posts below as well.

Maybe some of the solutions listed there will do the trick for errors 0xE401065D, 0xE000145C, and 0xE4010640.