Can we apply Resource topology, if we have Exchange 2003 co-existence with separate forest running Exchange 2007.What are the complications other than hardware and infrastructure.Thanks in advance.

Hi,What is the detail Exchange Topology?Exchange 2003 act as the resource forest? Exchange 2007 act as the resource forest?Are you ready tomigrate the Exchange Org? Id like to know why you want to deploy resource forest.With Exchange Server, we have the configuration to have dedicated Exchange Forest. With Exchange Server 2007,we have the configuration to have Resource Forest. Regards, Xiu

Hi Xiu, Sorry. I did not put in right way. Let me explain in detail scenario. We have Head office (HO) and 5 upcoming branch offices. HO and branch office (BO) has there own infrastructure but not in production evnironment. My management wantsseparate management and administration of serverson each BO. So, On each branch they wants separate Windows 2008 domain controller and Exhange 2007 server. HO already running on windows 2003 enterprise edition with SP2 andExchange 2003 with SP2. They have the migration plan of exchange 2007 on windows 2008 server.In same organization they want separate forests/domains for administration purpose. They wants same HO Exchange mails on theBOs.What exchange topology shouldwe go for?Thanks in advance.

Hi, If you need more details i will ready to give. Help me out to design the Active Directory Exchange topology?

As my understanding,we have5 domains in 5 forest.We want to set one exchange Organization for these 5 domain users.Administrator in each domain has administrative previlige on there own configuration on Exchange Server.1. Use Resource forest. We can have the same email address domain.a. Exchange Server implemet in one resource forest.b. 5 Account forests.c. Administrator can use Management Tools to manage the exchange server.2.Five Exchange Orgs. User send email use HO domain suffix. HO recive all the email for 5 domains and then deliver to other 4 domains.a. Use head office org domain as the public domain.b. create trust relationship between all the forest.c. Create other 4 domain user contact on HO.d. Add HO domain as accept domian on other 4 domains and set as primary email address space.d.Create internal relay for other 4 domain on HO.White Paper: Configuring Virtual Organizations and Address List Segregation in Exchange 2007http://technet.microsoft.com/en-us/library/bb936719.aspx