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I need to setup a Windows Server 2003 domain trust between different domains in different forests. I have attempted to configure DNS but I can only ping the domain controller but not the other domain. <br />
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- How do I configure DNS to see the other domain. <br />
- Once that is done, what do I need to do to do a two way trust. 
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I need to setup a Windows Server 2003 domain trust between different domains in different forests. I have attempted to configure DNS but I can only ping the domain controller but not the other domain. 

- How do I configure DNS to see the other domain. 
- Once that is done, what do I need to do to do a two way trust. 

Setting up a domain trust relationship

Active Directory (AD) is a Microsoft brand for identity-related capabilities. In the on-premises world, Windows Server AD provides a set of identity capabilities and services, and is hugely popular (88% of Fortune 1000 and 95% of enterprises use AD). This topic includes all things Active Directory including DNS, Group Policy, DFS, troubleshooting, ADFS, and all other topics under the Microsoft AD and identity umbrella.

Active Directory

Windows Server 2003 was based on Windows XP and was released in four editions: Web, Standard, Enterprise and Datacenter. It also had derivative versions for clusters, storage and Microsoft’s Small Business Server. Important upgrades included integrating Internet Information Services (IIS), improvements to Active Directory (AD) and Group Policy (GP), and the migration to Automated System Recovery (ASR).

Windows Server 2003

The Domain Name System (DNS) is a hierarchical, globally distributed system responsible for associating the name of a computer, service or other resource into an IP address for connecting to the Internet or a private network. Most prominently, it translates domain names to the numerical IP addresses needed for the purpose of computer services and devices worldwide.