Additional calendar-related features and issues within Microsoft Teams for Education
Hi Clive,
Greetings. To stop MS Teams Email and Calendar notifications, just need to click Profile picture > Settings> Notifications option, then select “Off” next to Missed activityemails row, click Edit button in Meetings row to turn off meetingstarted notification(Off) and meeting chat notifications(Mute). Feel free to let me know if you have anything unclear.
Reference: Manage notifications in Teams
Kind Regards,
Betty