How do I check to see if there is a UID?
I removed all the holidays as a temporary solution, but as you said I am running tests to see if the other events are duplicating when a change is made on the source calendar.
I’m trying to see if there is something we are doing that might be causing it. I don’t think there is though. We have changed the time or description of a couple events and they seem to have duplicated instead of updated.