Any idea why I get this error in thunderbird, while click "dismiss all" in notfications?
Status Code: 2147746065, The request cannot be processed.
Server Replied with 500
If you're seeing this message after snoozing or dismissing a reminder and this is for a calendar you do not want to add or edit events for, you can mark this calendar as read-only to avoid such experience in future. To do so, get to the calendar properties by right-clicking on this calendar in the list in the calendar or task view.