Hi,
From two weeks ago I started receiving warnings 1040 and ActiveSync:
"The average of the most recent heartbeat intervals [297] for request [Ping] 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)."
Firstly we do not have any problems with ActiveSync on any mobile device. Everything is working fine.
I've done all these things:
- In file \Program Files\Microsoft\Exchange Server\ClientAccess\Sync, I've changed Mini and MaxHeartbeatInterval to 0
- Changed the connection timeout in IIS to 30 mins for the default website
- modify the TCP Keep Alive Settings to 30min
Nothing has helped.
Then I've tried In file \Program Files\Microsoft\Exchange Server\ClientAccess\Sync, to reduce "HeartbeatAlertThreshold" from 540 to 250. But as soon as I've reduce this then ping has dropped from average 300 to 240 and I was again having Warning 1040. Then if I again decrease to 220 then average ping will drop below 220 and I'll still have Warning 1040.
We are using just standard Windows firewall and I do not see option how I can increase timeout on Windows firewall.
All these problems started two/three weeks ago. I'm not sure are they linked to recent upgrade from CU17 to CU23 or maybe some other windows update.
Thank you for your help
