Hello, After I installed the ISA 2004 SE and the relative firewall client on machine Windows XP Pofessional, I found that Outlook client can't refresh inbox and outbox folder automatically. When sent out mail, the outbox will always has one mail in outbox. I need to click or select another folder then the outbox item will be clear. (actually that mail already sent out after I click the send button). When someone sent me a mail, it will not disaply in my inbox immedately. I need to click or select another folder to make it refresh immedately. The mail is sent if client firewall isa is restarted. Thanks you very much Davide