A solution was recommended by a consultant which worked for my firewall.ASA(config)# service resetinbound interface "interface name"After we applied this we no longer experienced the Outlook client Exchange disconnects.Hope this helps. http://www.cis...

My company is experience a similar problem. Campus network with 100FX and 1000FX connections connect to an ASA 5520. Users experience delays between Outlook & Exchange. Logging did not show traffic being blocked. TAC suggested removing esmtp. no luck...