A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data
Many people have already sent feedback on the Feedback Portal. The gripe is something like this shouldn't have been implemented in the first place. The frustration with this issue is only in small part that no fix is available and no movement or official response from the dev team has been given. A lot of the frustration is the mindset and lack of voice of the customer that the dev team felt it was ok to build the notification in such a way that it can't be turned off. It shows a lack of attention to detail, and a lack of a robust QC process. I fosters a lack of trust that MICROSOFT with some of the deepest pocket available and a flagship program as ubiquitous as EXCEL used by professionals globally can't pay the right engineers and coders enough money to get the job done right. Everyone uses excel to some degree and as such one would think they would want to do it right.
That's why this response does not answer the question. Because it is lacking any substance for an issue vocalized by many people.