Ms Active Sync Issue

Hi ,

 We have windows server 2003 standerd with Exchange 2007. Today i get an error about Microsoft exchange active sync. i m attaching the file so please find the word document.

Even ID 1040 MS Active Sync
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Glen KnightCommented:
What firewall are you using?

Can you try the solution here with regards to changing the Heart beat Interval:
techgyanAuthor Commented:
thanks for your comments......
i will try to change heart beat interval then let u know.
techgyanAuthor Commented:
i found in my server there is following values. so in this which figure i need to change.

    <add key="MinHeartbeatInterval" value="60"></add>
    <add key="MaxHeartbeatInterval" value="3540"></add>
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Glen KnightCommented:
The Max timout is set to 59 minutes which is more than sufficient.

How often do you see the error in the event log?
techgyanAuthor Commented:
i m putting the exact error which is happening in my server. please see the following error.

(The average of the most recent [442] 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 you use Exchange ActiveSync, see Microsoft Knowledge Base article 905013, "Enterprise Firewall Configuration for Exchange ActiveSync Direct Push Technology" (

Glen KnightCommented:
As I asked before, what type of Firewall do you have?
techgyanAuthor Commented:
fortigate 60c firewall but i want to tell you one thing for your information.

Yesterday i upgrade my internet bandwidth plan from 2 MBPS To 4 MBPS and since morning i get this Error.

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techgyanAuthor Commented:
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