I'm using EWS Provider 4.0.0-beta4 and had an issue with a repeating event I was invited to.
I have set a reminder of 5 minutes before.
When the time was reached I got the normal reminder alert but could not confirm anything (dismiss or snooze). Because the alert blocks the calendar functionality I had to kill thunderbird. After restarting thunderbird the same happens again. The only solution for me was to remove the reminder in the web interface of the calendar.
I'm using EWS Provider 4.0.0-beta4 and had an issue with a repeating event I was invited to. I have set a reminder of 5 minutes before. When the time was reached I got the normal reminder alert but could not confirm anything (dismiss or snooze). Because the alert blocks the calendar functionality I had to kill thunderbird. After restarting thunderbird the same happens again. The only solution for me was to remove the reminder in the web interface of the calendar.