create an appointment on an Office365 group calendar programmatically

Hi kong mengfei,

In my research on the net, I found xchange Web Services .NET Core API for Microsoft Exchange server and Office 365/Exchange Online. The API offers complete Exchange Web Services functionality including the ability to work with appointment. There are a number of use cases on the site and the API itself is well documented. Link is http://www.independentsoft.de/exchangewebservices/tutorial/createappointment.html