Microsoft Graph supports events change notifications, which are subscribed on the calendar level, so that we can get new/deleted/updated event notifications without constant polling. I got it to work fine with the .NET Graph SDK.
But what about the calendars themselves? Microsoft users are free to create/update/delete their own calendars. My app needs access to these calendars, but is it possible to get notifications for these as well instead of polling?
I can't find any documentation on this. Yet from my experience, the calendar apps/clients etc that support Microsoft accounts (including MS's own Outlook of course) seems to have no problem showing new calendars rather quickly. Are they likely using polling for this, or is there any other workaround?