Based on the name, I have to infer that the mp_pushack.aspx is a way for the client to send acknowledgements of receipt of a push notification. Is that the only use of this page? If so, then what platform sends this response? I noticed that the call to this page happens very infrequently. I would like to understand under what condition this acknowledgment occurs. Is it also used to tell the system when a user has allowed Push Notifications to their device?
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