Need to get current calendar status for all users when Application starts and change notification from MS EWS
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My requirement is :

Req 1. When my application start then it should get the calendar status (e.g Busy, meeting etc) for many user (>1000).

Req 2. My application should get the notification for change in calendar status.

I saw many discussions about push notification for getting calendar status when status changes in exchange server (2010). But I did not get any way from which I can use “Push notification” to get the calendar status for all users when Application start.
