Disconnecting From Microsoft 365

I don't know if you can read the discussion I have with Microsoft.

The latest reply was:

"My sincerest apologies for the inconvenience this might be causing you. I do understand your query here but since your exchange account works as expected in the Outlook online/app, the issue seems particularly with the Google calendar app, since we are belonging to Microsoft community forum site support, we have limited knowledge about third-party app (Google Calendar app). Therefore, I sincerely recommend you contact Google support team for further assistance."

My reply to that:

"It is a good idea to contact support for Google Calendar app to have them ignore those calendars, but they are still available from the Exchange server. That means that if a shared calendar is removed from a Microsoft 365 account it will still be possible to access and read the contents of the events by simply using a 3rd party application.

Isn't that a potential security and privacy issue that needs to be handled?"

I hope my last question will make them realize that they need to fix this.