SBS 2000 and SBS 2003 - coexistence

We have a situation where we have an SBS 2000 server carrying on a variety of tasks - it acts as the Terminal Server, Exchange server, SQL server, the whole shooting works for an office.  We would like to split some of the jobs off this server onto an SBS 2003 server - the SBS 2000 would still remain the Terminal Server and would run some of the more difficult to reinstall apps but the SBS 2003 server would run Exchange, anti-virus, spam filtering and some of the SQL apps.

Is this configuration doable? What domain issues might we run into?
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You cannot install 2 SBS servers in the same environment.

A single SBS instance needs to be the center of the world for that domain, it cannot work with other SBS servers.

You will need to have SBS with a 2003 Standard server as a member server, to have more than a single server. Also, terminal services is not meant to be run on an SBS server, this is typically run on a non-domain controller server typically another 2003 Standard member server.

Perhaps it may be easier getting support for the apps that are difficult to move. You could then get a new SBS 2003 server and swing AD to the new server.

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Lee W, MVPTechnology and Business Process AdvisorCommented:
As MarkMichael has stated, this is NOT doable.  You cannot have more than one SBS server of any version in a domain.  This is because the SBS server MUST be the FSMO master domain controller.  You can either keep your existing server with SBS 2003 and buy a 2003 server (standard, non-SBS) or you can buy two new servers, one with SBS and one with standard server, migrating the SBS2000 system to the SBS2003 system.  The second 2003 non-SBS server would be for Terminal Services since SBS 2003 does not permit application mode terminal services on the SBS server itself.
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