I have tried to go through the documentation but didnt get a clear idea about difference in below calls:
GET users/{id | userPrincipalName}/events
GET users/{id | userPrincipalName}/calendar/events
GET users/{id | userPrincipalName}/calendar/{calendarId}/events
I did query them separately and they are returning same number of results. Which one is most efficient to use and in what scenarios each one of them is used.