I have my work Exchange account syncing with the default Mac OS Calendar app. Until recently, this worked very well and I would get notifications (with sound) for forthcoming events.
For the last week or so, the notification sound has vanished. I still get pop-up notifications at the right time, but no sound.
My exchange account presents three calendars: "Calendar", "Birthdays" and "United Kingdom holidays". Interestingly, the holidays calendar showed an alert today and there was a sound! So the problem is limited to my 'Calendar' Exchange calendar.
Here's what I've tried so far:
- I've looked in Notifications in System Preferences and ensured Calendar has "Play sound for notifications" enabled. I've also tried disabling and re-enabling this, to no avail.
- I've looked in Sound in System Preferences and ensured alert volume is set appropriately. I've also got "Play sound effects through" set to MacBook Speakers.
- Based on an answer below, I've tried removing the Exchange account from my Mac and re-adding it. No change.
- I'm running Catalina 10.15.13 on a MacBook Pro (13-inch, 2019, Four Thunderbolt 3 ports).
Here are the alert settings within Calendar:
Any suggestions for how to resolve this?