Hello!
Our CAS servers are showing a warning every 5-10 minutes in the Application Log:
"The average of the most recent heartbeat intervals [366] 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)."
What does this mean and how does it affect the end users? We haven´t got any issues reported.
Is there any solution?
//Christian
Christian Andersson, Exchange 2010 Administrator Jönköping Municipality, Sweden