whats is the firewall requirements for outlook 2007 and exchange server. i have firewall protection between the exchange firewall and user workstation using outlook. what is the firewall requirements betweent the 2. i need for outlook 2007(not express)

Is there a reason to have a firewall between the Server the LAN clients? I can see this on the perimeter of your network but not internally.MVP Exchange Server

the user workstation is in the LAN. we have a firewall protection on the user workstation. yes, very secure LAN.

LDAP (DC lookup): 389 LDAP (GC lookup): 3268 DNS: 53 RPC: 135, 1024+ Netlogon: 445 Kerberos: 88 OWA 443 (HTTPS) http://technet.microsoft.com/en-us/library/bb331973(EXCHG.80).aspx MCP, MCSE 2000 , MCSA 2000 ,MCSA 2003 , MCITP , MCTS , MCT

If you have perimeter security and the LAN is protected, I see no reason to enable Windows Firewall. You can allow the exceptions with ports Mohamed posted to the firewall on the computer. The windows firewall is typically used on a computer that leaves a secure lan and goes outside your network such as a laptop so I can see the need in this case.MVP Exchange Server

LDAP (DC lookup): 389 LDAP (GC lookup): 3268 DNS: 53 RPC: 135, 1024+ Netlogon: 445 Kerberos: 88 OWA 443 (HTTPS) http://technet.microsoft.com/en-us/library/bb331973(EXCHG.80).aspx MCP, MCSE 2000 , MCSA 2000 ,MCSA 2003 , MCITP , MCTS , MCT thank you very much. this is just what i need.