Hi, we have Exchange 2007sp1 installation with one domain test.domain.com which works pretty fine. However, we want to add a secondary domain test2.domain.com which led us into troubles. One machine with MS Exchange is a domain controller for test.domain.com, second machine is a domain controlled for test2.domain.com, first is also DNS server. Both machines see each other, both machines can controll active directory of both domains. But, whenever I try to select domain in MS Exchange console, it ends up in the error message "0x8007203A server is not operational", firewalls are off, machine is fully operational. We are lost in space. Thanks for any advice.

Hi, Here are few article which can help in configuration : http://www.msexchange.org/articles_tutorials/exchange-server-2007/planning-architecture/exchange-2007-smtp-namespace-sharing-different-relay-domain-types.html http://www.msexchange.org/articles_tutorials/exchange-server-2007/migration-deployment/shared-hosting-exchange-2007-part1.htmlRipu Daman Mina | MCSE 2003 & MCSA Messaging

Unfortunately that did not help me in my problem. Accepted authoritative domains are already added. But when I power down the machine with domain test2.domain.com then Exchange will let me choose test.domain.com, but if both machines are operational, then Exchange ends up in the error above. So there must be a problem with settings of the secondary server with test2.domain.com? Any clues?

Hi, Just for info, have to run forestprep & domianprep after introducing new domain.Ripu Daman Mina | MCSE 2003 & MCSA Messaging

Hi, Just for info, have to run forestprep & domianprep after introducing new domain. Ripu Daman Mina | MCSE 2003 & MCSA Messaging But there is no new installation of Exchange 2007, forestprep and domainprep are run during the exchange installation, I have a secondary domain that is not vibisle in Exchange, but it is visible everywhere else.