OneNote - All Notebooks Suddenly Empty

I also experienced this issue in my OneNote 2010 which runs on Windows 10 Creators Update.

Finally, the following article provide a workaround for the issue:

Resolve the 0xE0000784 (Web DAV is Disabled) error in OneNote

Update:

Next day, I experienced that the same issue still happen unfortunately.

This workaround doesn't appear to be effective.

My situation has taken a turn for the worse. Since I was losing all my Notebooks so frequently, I turned off auto-sync.

Five days later, after lots of changes to my OneNote content, I decided to try to manually re-sync. All notebooks disappeared. Examining them online, I found that they were, naturally, five days out of date!

So I'm left with outdated notebooks online, a set of daily backups that I had configured in Options, a bunch of "Misplaced Sections" and "Open Sections" at the bottom of my Notebook list in the OneNote program.

What a mess.

I tried to get the MS support person to guide me through restoring things back to normal, but she said it was too complex and wanted to charge me $99 to do it.

Microsoft Answer Desk, huh? Here's what they said:

"It looks like the issue is more complex and will take significant time to resolve. There are two premium support options available to you. We guarantee this issue will be fully resolved to your satisfaction. The first plan which is our Premium Software Support comes with a 30-day warranty should this particular issue reoccur in the near future. The second, more popular choice for customers is our Assure Plan which covers not only this issue but any future issues you may have with Windows, Office, Viruses and Malware and also includes PC Tune-up services to ensure your system runs as efficiently and protected as possible; for one full year you can contact Answer Desk to resolve any of these issues with the peace of mind that experts like myself that know your Microsoft products better than anyone will offer complete end-to-end support."

Lovely. That a $99 charge for this, by the way.

The support chat person said she's always having her Notebooks disappear. She said "just wait a few hours and they should be back."

I mentioned that OneNote had automatically backed up my Notebooks, and asked how to restore the backup. Here's the conversation (reference number: **********):

*support*

Please open your OneNote 2010.

3:06 am

Me

it is

3:07 am

*support*

Then click on File.

3:07 am

Lea Shelle F

Then select on Options.

3:07 am

*support*

Then look for Save and Backup

3:07 am

Me

got it

3:07 am

*support*

Under the Save section, you can see the backup folder. Please take note and search for that location in your File Explorer.

3:08 am

Me

ok, i've opened it in Explorer

3:09 am

*support*

Please tell me if you were able to find the backup files, Scott.

3:09 am

Me

Yes, there are a LOT of folders in there

3:09 am

*support*

Check for your file because I am confident that it is there.

3:10 am

Me

I'm not just missing "a" file. I'm missing all of my Notebooks.

3:11 am

Me

I do see folders in there with the names of my notebooks

3:12 am

Me

How do I restore them? Will they replace the "empty" ones in my desktop app, or create new notebooks?

3:12 am

*support*

I see, thank you for that information Scott.

3:12 am

*support*

It looks like the issue is more complex and will take significant time to resolve. There are two premium support options available to you. We guarantee this issue will be fully resolved to your satisfaction. The first plan which is our Premium Software Support comes with a 30-day warranty should this particular issue reoccur in the near future. The second, more popular choice for customers is our Assure Plan which covers not only this issue but any future issues you may have with Windows, Office, Viruses and Malware and also includes PC Tune-up services to ensure your system runs as efficiently and protected as possible; for one full year you can contact Answer Desk to resolve any of these issues with the peace of mind that experts like myself that know your Microsoft products better than anyone will offer complete end-to-end support.

3:13 am

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We are all still experiencing the same issues no matter what we've tried!  Just like last August!  Same thing.  It's nothing we can fix ourselves...