How to move a SBS to an existing win2000 domain?

We will soon need to move users from a SBS domain to our existing domain.How do I go about moving a SBS domain clients to an existing win2000 domain and maintaining their mailboxes?  The existing domain already has an Exchange 2007 server.  We would like to run another server in place of the SBS but this will depend on cost.

Thanks for the help
cg
cgunixAsked:
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Dimarc67Commented:
Several factors in play here.  First, what version SBS is it?  Second, please confirm that you are wanting to move your SBS users to a Windows 2000 domain (and not 2003).

Your best bet is to use Microsoft's Active Directory Migration Tool (ADMT) which is specifically designed to move users between separate forests and domains.  The fact that one or yours is an SBS server should be irrelevant.

Download the ADMT here:
http://www.microsoft.com/downloads/details.aspx?familyid=6F86937B-533A-466D-A8E8-AFF85AD3D212&displaylang=en

Dimarc67
New York, NY
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cgunixAuthor Commented:
This would be SMS 2003.
On this second question, there are 2003 servers and 2000 servers, NT server just retired.  Obviously it is in mixed mode but what determines the domain type? Exchange is also running on the SBS.  Could you also point out a best practice solution to move the mailboxes to the new domain?  Thanks
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Dimarc67Commented:
With Win2003 up and running, it's a Windows 2003 network in mixed mode (as you indicated).  I just wanted to make sure you were moving from SBS 2003 to Windows 2003.  Moving to a Windows 2000 AD could've been problematic.

You can use ExMerge to move the mailboxes after the accounts are migrated.

Microsoft Exchange Server Mailbox Merge Wizard (ExMerge):
http://www.microsoft.com/downloads/details.aspx?familyid=429163EC-DCDF-47DC-96DA-1C12D67327D5&displaylang=en
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cgunixAuthor Commented:
Dimarc,
Before using ADMT, the SBS will need to be connected to the existing 2003 domain.  What would you suggest as a best practice on connecting to the existing 2003 domain since the SBS assumes all FSMO roles, dns...  Thanks
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Dimarc67Commented:
The SBS does NOT need to be integrated into the existing domain. ADMT is specifically for migrating user accounts from one domain or forest to another. From Microsoft's download page (the link I previously provided):

Overview
The Active Directory Migration Tool version 3 (ADMT v3) simplifies the process of restructuring your operating environment to meet the needs of your organization. You can use ADMT v3 to migrate users, groups, and computers from Microsoft® Windows NT® 4.0 domains to Active Directory® directory service domains; between Active Directory domains in different forests (interforest migration); and between Active Directory domains in the same forest (intraforest migration). ADMT v3 also performs security translation from Windows NT 4.0 domains to Active Directory domains and between Active Directory domains in different forests.

Once all of your users, mailboxes, file shares, and any customized GPOs or scripts are migrated to the existing domain, you'll be able to re-purpose the SBS machine as you see fit, including wiping it clean and building a new member server or DC for the existing domain.
D.
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cgunixAuthor Commented:
Thanks Dimarc
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