I was reading question asked previously Office 365 shared calendars
Is the options to access shared calendars of authenticated user using Oauth to authenticate available now ?
Basically I am trying to implement a service using "OAuth2 client credential flow", but I want to access a calendar only if it is shared with a particular user using rest api call: https://outlook.office365.com/api/v1.0/Users/"+emailId+"/calendargroups/"+"group id of Other Calendars"+"/calendars/{calendar_id of shared calendar}.