Adding/Updating SharePoint O365 Calendar Event
To add or update a calendar in SharePoint 0365:
First connect to the SharePoint site
[caption id="attachment_145" align="alignnone" width="300"]
[/caption]
Now if the the listItemCollection already has data, update it or insert a new Calendar event.
![SharePoint2](https://msdntnarchive.z22.web.core.windows.net/media/2016/07/SharePoint2-272x300.png)