Microsoft Graph API Shared Calendar IDs inconsistent between users

Question

My application allows users to schedule events on shared calendars and allows other users to potentially reschedule or cancel those events. I ask for the Calendar.Read

Answer 1

I use for this a calendar of an account with given privilegies to other people. So I can access to this cal from each account with

/{$user}/calendar/{$cal}/

Also I can Sync with delta:

/{$user}/calendarView/delta?

But this works only for "one" calendar, at this moment there is no "delta" for an explizit calendar.