PROBLEM
We want to track changes in user calendars, but are concerned with how often we'd need to check 2000+ user calendars (Outlook).
Would the process of monitoring over 2000 user calendars present a problem for our network?
WORKFLOW
Trigger (Check for calendar change) -> ACTION (Http: update a DB)
The Trigger below checks a calendar every 2 seconds. Is there a trigger that behaves like a "subscription" object where it simply handles a change notification?
For the question about how often to check the calendar events, it depends on your requirement. In my opinion, if you set check event every 2 seconds(it's a little bit more frequent), you'd better check if your logic app set as run in parallel. You can click the ... button of the trigger and click "Settings". Then check if it is same to below screenshot.
For your question about is there a trigger that behaves like a "subscription". I'm afraid it doesn't exist a trigger which can implement this requirement in logic app. We can also check if any backend api can implement it, we can see the graph api document.
The example in above screenshot is for mailFolders, but it's same with events. We can see it is necessary to specify a user(like me) or a group before the /events. So I don't think we can monitor the subscription events. You can raise a post on Azure feedback page to suggest developer add this feature.
