Hi, I came across an Exchange 2003 which was installed in a forest with many child domains, now the organization want to demote those child domains, so I want to know which child domain Exchange 2003 belongs to. Thanks in advance.

There are many ways you can do that1. From command prompt run set L (will give you the DC name from where it has logged on).2. Run Exbpa.3. Run NLTEST with dsgetdc and dsgetsite switch.Raj

Thank you Rajnish for your help, however, running Exbpa showed me that Exchange server belongs to the parent AD "under information items", but when we create any user in that parent domain or any other child domain, the user gets this address: user@childdomian.parentdomain.com NOT user@parentdomain.com So why those user addresses are pointing to a child domain?

Hi,Check the recipient policy. The SMTP address always get stamped based on the recipient policy that you configure.Raj

Hi,What do you mean"demote those child domains"? Do not wnat to use child domain as email address domain? Remove all the child domain and remove all the account in child domain,remove all the mailbox in child domain?Also please check event 2080 to verify which DC has been listed there.Please check the recipient policy and SMTP address space.Regards,Xiu

Hi, What do you mean"demote those child domains"? Do not wnat to use child domain as email address domain? Remove all the child domain and remove all the account in child domain,remove all the mailbox in child domain? If I discovered that Exchange is really using a child domain instead of the parent one, then I will not demote it, otherwise yes it should be removed.

Thank you all, I've checked the "SMTP address properties" in "Recipient Policies", and the address field is "@childdomain.parentdomain.com ". Now what would happen if I just edited the name and deleted "childdomain "! P.S., this exchange in not connected to the outside world, its used only internally and employees send emails to each others through their name in the contact list, they don't even know what their real email address.

It will not make any difference in case the GAL is used only for internal mail routing.Raj

Hi,After you modify the policy,please restart Recipient update services.Also please wait DC to replicate with each other after you demote the child domian.How to remove data in Active Directory after an unsuccessful domain controller demotionhttp://support.microsoft.com/kb/216498Note: Please ensure that the Exchange Server has been installed inparent domain,but not in child domain.Regards,Xiu

Note: Please ensure that the Exchange Server has been installed inparent domain,but not in child domain. Hi, I have modified the recipient policy and restarted the whole exchange server, and now everything is working fine, even old users got their emails changed to the parent domain. Now the question is: "Running Exbpa showed me that Exchange server belongs to the parent AD "under information items " Is that sufficient, shall I go ahead and demote the child domain?

Yes, you can go ahead with the demotion of the child domain DC. As the exchange is talking to the DC in parent domain, so need to worry. Go ahead with the demotion. Just make sure for the following1. Take a system state backup.2. Make sure that after demotion , you reboot teh machine and look for any error on AD.3. No DHCP or DNS is there on child domain.Raj