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My organization has opened an office in another state. We decided to create a subdomain for all those users. We would like those users to use our exchange server for email. But to use exchange they have to have an account on the parent domain. Is there a way to for exchange to handle users on the subdomain without having to create an account for them on the parent domain. If the answer is yes then please outline the steps. We are using active directory, exchange 2003 and windows 2003 server.
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My organization has opened an office in another state. We decided to create a subdomain for all those users. We would like those users to use our exchange server for email. But to use exchange they have to have an account on the parent domain. Is there a way to for exchange to handle users on the subdomain without having to create an account for them on the parent domain. If the answer is yes then please outline the steps. We are using active directory, exchange 2003 and windows 2003 server.

Microsoft Exchange Services for Subdomains

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Within Internet message handling services (MHS), a message transfer agent or mail transfer agent (MTA) or mail relay is software that transfers electronic mail messages from one computer to another using a client–server application architecture. A MTA implements both the client (sending) and server (receiving) portions of the Simple Mail Transfer Protocol (SMTP). The terms mail server, mail exchanger, and MX host may also refer to a computer performing the MTA function. The Domain Name System (DNS) associates a mail server to a domain with mail exchanger (MX) resource records containing the domain name of a host providing MTA services.