A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Hi Jirka_CR,
Thanks for visiting Microsoft Community.
I understand the issue you are facing.
When members post or reply to comments in a shared document, OneDrive sends email notifications to draw attention to important changes. Currently, this feature is by design in OneDrive and cannot be turned off with a button.
You can provide feedback on this email notification feature in the article mentioned below.
Thank you for your understanding. I hope the above information helps you confirm the situation.
Best Regards,
Jonathan Z - MSFT | Microsoft Community Support Specialist