troubleshooting Question

active sync

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i_harfoushFlag for Kuwait asked on
ExchangeHardware FirewallsiPhone
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i have Iphone 3GS, I configure active sync in my exchange 2003 server, i am getting this log,
The average of the most recent [200] heartbeat intervals used by clients is less than or equal to [540].  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.  For more information about how to configure firewall settings when using Exchange ActiveSync, see Microsoft Knowledge Base article 905013, "Enterprise Firewall Configuration for Exchange ActiveSync Direct
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