Hello @Krishnalakshmi Viswanathan (AWF) thank you for reaching out. You are correct, the event id is a read-only value created when the event is created either via API or the client. From the event resource properties, iCalUId
is a unique identifier for an event across calendars. This ID is different for each occurrence in a recurring series. To update or forward the event, you should use the id in the request url - then pass the iCalUId in the request body to make changes to one event in a series.
Please also consider upvoting the answer if it helps and feel free to reach out with any questions,
Diana.