Hi Weiyi,
The “/v2/webinars/517912534” API is used to retrieve the webinar scheduled info and the “/v2/report/webinars/517912534” API is used to retrieve the past webinar info.
Since /v2/webinars/517912534 has been deleted you can’t retrieve the webinar info through the “/v2/webinars/517912534” API. However, since the webinar was started, you can still retrieve info through “/v2/report/webinars/517912534” API.
Thanks