UWP: Alert When Deleted Multiple OneNote Pages on OneDrive to Prevent Lost Notes

Gem Menu for OneNote UWP has done a lot of real-time work to prevent you losing notes while using OneNote for Windows 10.

Gem Menu had provided automatic backups for preparation for the ability to recover notes. You can read this article in detail:
UWP: Auto Backup OneNote for Windows 10 for Recovery When Lost Notes
 
Now, the Gem Menu adds the ability to reminder while note lost.

Open Notes Quantity Monitoring Function 
Click Gem Menu for OneNote UWP -> “Gem” menu -> “Options” menu item.
It will open Gem’s options window.
 
In the options window, click “Online” tab:
 
Step 1, Login OneDrive
In the OneDrive Login group, click “Login OneDrive” button, and login OneDrive with your Microsoft account.
 
Step 2, Enable Lost Pages Alert
In “Lost Pages Alert” group,
Check: Monitor number of pages in account. Alert when delete pages.
 
At the same time, you can specify a period of time (30 minutes), delete more than a certain number of notes (the default is 5), and treat that as a large number of notes are missing.
 
The number of notes monitoring function is turned on.
When you delete more than a specified number of notes over a period of time, the page number window automatically pops up to help you to check if you are missing your notes.

View the Total Number of Notes 
After you open the Note Quantity Monitoring feature, you can view the total number of notes by following these steps:
Click Gem Menu for OneNote UWP -> “Edit” menu -> “Pages Number” menu item.
It will open “Pages Number” window.
In this window, you can see the number of notes saved on OneDrive in your account.

View the History of Pages Number 
Click the “History” button in the Pages Number window.
It will open the long history of recording the total number of notes on OneDrive created by Gem Menu.
It will help you to check if the notes are suddenly significantly reduced.

Recover Notes 
If you have found lost notes, you can use the backups provided by the Gem Menu to see if it is possible to resume your notes as soon as possible.
Read this article:
UWP: Auto Backup OneNote for Windows 10 for Recovery When Lost Notes