This Applet monitors a Microsoft 365 Calendar you choose and every time a meeting on that calendar starts, your Android device's ringtone will be muted. Use this complimentary Applet to turn the ringtone back on after an event ends: https://ifttt.com/applets/e5ivnzdx

This Trigger fires a set number of minutes before the starting time of any event on your Microsoft 365 Calendar.

This action will mute your Android device's ringtone. If your device is already muted, it will remain muted.

When a meeting starts, automatically mute your Android ringtone