Event ID - 3033

Event Id3033
SourceServer ActiveSync
DescriptionThe average of the most recent [200] heartbeat intervals used by clients is less than or equal to [9]. Make sure that your firewall configuration is set to work correctly with Exchange ActiveSync and direct push technology. Specifically, make sure that your firewall is configured so that requests to Exchange ActiveSync do not expire before they have the opportunity to be processed.
Event InformationAccording to Microsoft :


This issue may occur if the firewall has not been configured to let HTTP(S) requests live longer than the minimum heartbeat interval that is configured on the server that is running Exchange Server 2003 SP2. By default, the minimum heartbeat interval at which the Exchange server triggers this event is nine minutes.


To resolve this issue, modify the firewall time-out values for HTTP(S) connections to the Exchange server to be greater than the default time-out limit of eight minutes.

Note: This connection is not referring to the Connection Timeout field that is in the IIS MMC snap-in. Alternatively, modify the minimum heartbeat interval. We recommend that the firewall time-out value be set to a minimum of 15 minutes for the Exchange Direct Push Technology Always-up-to-date (AUTD) feature to perform optimally.
Reference LinksEnterprise firewall configuration for Exchange ActiveSync Direct Push Techno

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