A family of Microsoft products that enable users to capture, organize, and reuse notes electronically.
Dear Teo Chye Keong
Good day! Thank you for posting in Microsoft Community.
Based on your description, we did a test on our end with class notebook. If teachers lock the distributed page, the students only can view the page. But if we unlock the page, students can edit the page so they can delete the teacher's annotations.
We did several tests with different class notebook, and we have to tell you that it's impossible to prevent students delete teacher's annotations in unlocking page.
Apologize for the inconvenience caused due to this behavior in OneNote.
Given this situation, we kindly suggest you submit feedback in OneNote · Community (microsoft.com) It is the best platform for the product team to listen to your opinions and make the related team to improve this behavior. The Product Team is in-charge of the feedback site, and they are constantly checking the comments and feedback from our customer. Many features and such behavior have been developed or improved based on users' comment. Your feedback will increase the awareness coming from the related team.
If you need any further assistance, please feel free to post back. We’re looking forward to your reply and will continue to help you all the time!
Your understanding and patience will be highly appreciated. I hope that you are keeping safe and well!
Sincerely,
Stacey | Microsoft Community Moderator