OneNote Sync Error (OneNote can't connect to the network. We'll try to sync your notes when the network is available. (Error code: 0xE000006B b6d09)

Found a solution/workaround for when this happens. If you copy the notebook, close the old one, and reopen the new copy it will reset your sync. You may need to reshare the link with anyone else you want to work on the notebook. But this worked for me.

1. Open the Notebook that you want to copy.  With the Notebook open …
2. Click on "File" then "Export"
3. Export Current:  Click on "Notebook"
4. Select Format:  Click on "OneNote package (*.onepkg)"
5. Click on "Export" to begin the copy process
6. File Explorer opens---choose where the copy of the Notebook is to be placed (Ex. This PC, Documents folder or OneDrive, Documents folder).  Remember, if you want to be able to share this Notebook or access it from anywhere, it must be placed in OneDrive.  So, click on OneDrive, then Documents.
7. "Open" the Documents folder and give the Notebook a new name--it must be different from the original name of the Notebook, then click on "Save"
8. Open File Explorer again and find the Notebook with the new name.
9. Double-click on it to unpack it.
10. Click on "Create" to create the copied Notebook with the new name.
11. Good Luck

This worked for me as well! This just started for me. I noticed that my notebook wasn't up to date on the OneNote app on my phone. Then noticed that the notebook was having the same syncing issue on the desktop app that everyone is describing in this thread.

This works! Thank you.

Win10

OneNote Version 2306

I am also having the same problem as the OneNote on my desktop is not syncing with the OneNote on the OneNote website or OneDrive Website.

It is unacceptable that we, the customers, have to deal with this issue and inconvenience. Please fix it ASAP.

Thanks,

Yasmin

I also have the same problem with Office 365 OneNote sync while using Avast.

Deleting OneNote cache folder in "%USERPROFILE%\AppData\Local\Microsoft\OneNote\16.0" help me solve problems.

The suggestions made in this related thread.

new notes not syncing. - Microsoft Community

In my case I just following part 5, step 1.

Thank you to those in this thread who said Avast was a problem. I was experiencing this issue for about a month where OneNote on my Windows laptop would not sync with OneNote in One Drive. In the Avast I am using in the U.S., latest version, there was only the option to turn off "Web Shield" entirely. I turned it off to test and sure enough all my OneNote notebooks synced correctly.

However, I didn't want to turn off Web Shield entirely. So there is an option in Avast to enter an exception. Go to Menu > Settings> General > Exceptions > Add Exception. Then type in your notebook's URL address like this: https://onedrive.live.com/\*

Be sure to put the asterisk in.

Now I can run Avast with the web shield turned on but without interfering with my OneNote. The URL you enter into Avast for the exception may differ depending on where you are syncing your notebooks to.