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Heartbeat problem ActiveSync & ISA 2006

Posted on 2009-04-03
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Last Modified: 2012-05-06
I am recieving a lot of 'delivery failures' since three days ago, and they appear to come from a ActiveSync/ISA problem. The below error i get out of my server. I allready checked the ISA Server Web Listener time-out and this is set to the recommended 1800 seconds. I still recieve all the error and Delivery Failures. Has anybody got any idea where this error is comming from and how to resolve it?

Bart Velt

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 Push Technology" (http://go.microsoft.com/fwlink/?linkid=3052&kbid=905013).
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Question by:xiss
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by:Jamie McKillop
ID: 24170277
Hello,

On your web listener, go to the Forms tab then click Advanced. Make sure the box beside "Apply session timeout to non-browser clients" is unchecked.

JJ
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by:xiss
ID: 24302504
Hi JJ,

Sorry for the late response this doesn't fix the problem the box is allready unchecked. Any suggestions?

Thanks,

Kasper
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Jamie McKillop earned 500 total points
ID: 24303712
Are you sure your delivery failures are related to this ActiveSync error? Can you provide more info about the delivery failures?

JJ
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