Is it possible to have Exchange 2000 Server integrated with existing Active
Directory and process mail for two domains?

The existing domain name is win.company.net, using a single domain
controller. The exchange server is a member of this domain, named
server1.win.company.net.

The exchange server's Recipient Policies allow it to process mail for the
domains, win.company.net and company.com. (Both "company" names are the
same).

The exchange server is currently only used on the internal network an is
used for internal mail, calendaring and internal public folders. External
mail is processed on a Linux platform that uses the company.com domain name
and the Outlook clients pull mail from both sources.

Management would like to get rid of the two server configuration and prefers
Exchange. Could we simply install another NIC in the Exchange Server; place
this new interface in the DMZ; name that interface server1.company.com,
assign it a public address and route all SMTP traffic to that hostname via a
hole in the firewall which only allows SMTP traffic to that host and still
retain both the internal functionality we currently have, and receive mail
from both company.com and win.company.net, without tearing down the current
Active Directory infrastructure, renaming and rebuilding it?

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