Dear All
I have problem i need immediate support the problem is Webmail and Outlook any where not working in some users some times work and some times disconnect also my old emails messages i can't find it other user not have this problem actually i see this warning in event viewer :
The average of the most recent heartbeat intervals [489] for request [Sync] 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).