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EWS: Resource-/Performance problems with many unused PullNotificationSubscriptions? RRS feed

  • Question

  • Is it possible that the MS Exchange Server could be become resource- or performance problems with many stored unused PullNotificationSubscriptions?

    We have seen with our application (running as a Windows Service with integrated EWS Managed API 1.1) if we stop the Windows Service we have to unsubsribe the PullNotificationSubscriptions for every mailbox user stored in the MS Exchange Server (can be 200 users) and the delay of the answer for the unsubscribe request can be more than 1 second!, so we have to wait a very long time until the Service is stoppt (if not a timeout occurs and we have to kill the process!).

    By the way: The subsription timeout in our case is 30 minutes!

    To avoid this problem we have thinked about the solution to do not unsubscribe all the PullNotificationSubscription and only stop the service (we know after the subscription timeout these supscriptions will be removed automatically). In this case we have for a while many not used subscriptions in the MS Exchange Server. And if we start and stop again and again our Windows Service, what happens then with the resources/performances of the MS Exchange Server?

    Thursday, December 16, 2010 9:45 AM