Audrie demos how to post a new event to the current user's calendar selection, using the Office 365 Users and Outlook connectors.
Helpful formula template notes...
Get list of calendars for current user in a dropdown:
Office365.CalendarGetTables().value
OnSelect Button to Create Event:
Office365.V2CalendarPostItem(ddUserCalendars.Selected.Value, txtMeetingTitle.Text,
Text(DateEventStart.SelectedDate,DateTimeFormat.UTC),
Text(DateEventEnd.SelectedDate,DateTimeFormat.UTC),
{Body: txtDescription.Text, IsHtml: true, Location:txtLocation.Text} )
Additional References:
https://docs.microsoft.com/en-us/powerapps/connections/connection-office365-outlook
https://docs.microsoft.com/en-us/powerapps/connections/connection-office365-users
