Hi Exchange Specialists and Experts,I am planning to deploy Exchange 2003 in my organization but I am confused how to do it.As you know, the Active Directory in my organization is a single forest with 3 child domain.My domain structure is divided into 3 sites at different locations as follow:1. North site:- Domain: test-scb.net (root domain)- child domain: north.test-scb.net2. Central site:- Domain: test-scb.net (root domain)- child domain: central.test-scb.net3. South site:- domain: test-scb.net (root domain)- child domain: south.test-scb.netNote: test-scb.net domain doesn't host the production user accounts. It only keeps the root function in AD. Now I want to setup the Exchange Server on domains: north.test-scb.net, central.test-scb.net and south.test-scb.net. What I want is "using a single namespace {@test-scb.net}" for a whole forest.In Exchange Server 2003, there is a function "Recipient Policy" to add additional alias to an existing mail address. With that function, we can add "@test-scb.net" to 3 Exchange servers at north, south, and central. However, we can't resolve the duplicated mailbox at diffirent sites and how to deliver incoming mail from Internet.For this issue, PLEASE kindly help me.Thank you very much in advance !Best regards,Lai Thanh Binh

Hi, Lai Thanh BinhI saw ur post just now. I am trying to do the same thing as u mentioned. How goes it? Have u done the exchange stuff in ur child domain? Could u pls give some information to me, I'll be very appreciated. Best wishes!Loesprite

Hi, Just now saw ur Post.You Will implement Mail server in All domain Correct ( Child Domain) Ok Fist u will install in forest /prep and Domain /Prep finally setup in Forest Root Domain Then u will install Domain /prep in each Child Domain and finally install Setup it will enough for mail server implement in all Domain. Regards Shiva