The local computer is a domain controller of a child domain_LocalComputerIsDCInChildDomain
Applies to: Exchange Server
Topic Last Modified: 2012-06-05
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Microsoft® Exchange Server 2007 setup cannot continue because the local computer is a domain controller for a child domain.
Exchange 2007 setup will not install on to a domain controller for a child domain unless the domain controller is a global catalog server.
To resolve this issue, promote the domain controller to a global catalog server or install Exchange 2007 to a non-domain controller, a member server, in the child domain, and then rerun the Microsoft Exchange setup.To correct this warning by making the Exchange server a global catalog server
On the domain controller, click Start, point to Programs, click Administrative Tools, and then click Active Directory Sites and Services.
In the console tree, double-click Sites, double-click the name of the site, and then double-click Servers.
Double-click the target domain controller.
In the results pane, right-click NTDS Settings, and then click Properties.
On the General tab, click to select the Global catalog check box.
Restart the domain controller.