Hello everyone ! Here is the problem: I want to publish an Exchange server using ISA Server and a ) DNS configuration, * Windows 2003 ActiveDirectory domain, with 1 Domain controller: contoso.local * Exchange 2003 messaging with 1 Exchange server : contoso.local * One ISA 2006 Server with 2 network cards Two networks: local network (the contoso.local) and the external network (internet)and the external DNS server for the public domain name (contoso.com) is on a local ISP. Now i'm confused, can't find an article or a tutorial on the internet in order to publish the exchange server using ISA..how to do?How can users send/receive emails to/from the internet with the same exchange server. I've already the registered the domain and the MX records. If u have a link to an article or if u can help me that would be great. Regards

Dear customer: Thanks for your post. ISA Server acts as an advanced firewall that controls Internet traffic between any numbers of networks that are connected to it, through its multinetworking feature. In the Exchange scenario, ISA Server will control traffic entering your internal corporate network and outbound communication from your messaging environment. When you use ISA Server to handle all inbound requests from client applications such as Microsoft Office Outlook 2003 and Outlook Web Access, your Exchange front-end servers no longer need to be located in the perimeter network, and your Exchange resources are protected from attack. All inbound Internet traffic bound to your Exchange servers, such as Microsoft Office Outlook Web Access, RPC over HTTP communication from Microsoft Office Outlook 2003 clients, Outlook Mobile Access, Post Office Protocol version 3 (POP3), and Internet Message Access Protocol version 4rev1 (IMAP4) are processed by ISA Server. When ISA Server receives a request from a client application such as Outlook 2003 to access information on an Exchange server, ISA Server routes the request to the appropriate Exchange servers on your internal network. The internal Exchange servers return the requested data to ISA Server, and then ISA Server sends the information to the client through the Internet. For more information about Using ISA Server 2006 with Exchange Server 2003, you can refer to the following documents: Publishing Exchange Server 2003 with ISA Server 2006 http://technet.microsoft.com/en-us/library/bb794845(TechNet.10).aspx How to configure ISA Server 2006 or ISA Server 2004 to allow for RPC over HTTP client connections from Office Outlook 2003 to Exchange Server 2003 http://support.microsoft.com/kb/884506/en-us If the following conditions exist, Exchange Server 2003 is able to receive Internet mail in its default configuration: There is a constant connection to the Internet. The external Domain Name System (DNS) servers for your domain must have mail exchanger (MX) resource records pointing to your mail servers, or, if you are using an Internet service provider (ISP) or an external system, this external system must have an MX record for your domain and a mechanism to forward mail to your Exchange servers. Your mail server must be accessible to other servers on the Internet. If you are using an ISP or external system to receive your mail, this external system must be able to contact your Exchange servers to deliver your mail. Your recipient policies must be configured correctly. To receive Internet mail, you must configure a recipient policy that contains an address space matching the SMTP domain. Also, your Exchange organization must be responsible for delivering mail to this address (this is the default setting). For example, to accept Internet mail for ted@example.com, you must have a recipient policy that contains @example.com. However, there are some exceptions to this rule. Assuming there is a constant Internet connection; Exchange sends Internet mail by the following methods: It uses DNS directly to contact the remote mail server. It routes mail through a smart host that assumes responsibility for DNS name resolution and mail delivery. Exchange Server 2003 implements a new version of Internet Mail Wizard that helps you configure Internet mail connectivity in Exchange Server 2003 or Exchange 2000 Server. By using Internet Mail Wizard, you can configure an Exchange server to send Internet mail, receive Internet mail, or send and receive Internet mail. Furthermore, using Internet Mail Wizard means that you do not have to manually configure the SMTP connector and SMTP virtual server. Internet Mail Wizard automatically creates the necessary SMTP connector for outgoing Internet mail and configures your SMTP virtual server to accept incoming mail. For more information about how to use Internet Mail Wizard, please refer to the following documents: Microsoft Exchange Server 2003 Transport and Routing Guide http://www.microsoft.com/downloads/details.aspx?FamilyID=c092b7a7-9034-4401-949c-b29d47131622&displaylang=en I hope the information above can address your concerns. If anything is unclear, please feel free to let us know. Rock Wang - MSFT