New answers tagged exchange
The answer from D.Woods is good if the calendar you are trying to access is not being actively updated (for example an office holiday calendar). Otherwise, if other users are actively add and removing appointments, the solution will not keep the calendars in sync. You could work around this by periodically repeating the process but this is less than ideal. ...
As Feuermurmel says, you can create a new calendar and move it there. But instead of hiding the new calendar, you can just delete the calendar. Worked well for me; the event is gone with no notifications.
I also had this problem. What worked for me was a hybrid of the two suggested solutions so far: Go to Calendar -> Preferences -> Account De-select "Enable this account" Re-select "Enable this account" Now the account shows up.
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