Only one Small Business Server can be in the domain

Windows Small Business Server 2003 Setup cannot continue because multiple computers running Small Business Server were detected in the network.

Only one computer running Small Business Server can exist in a Small Business Server domain. However, if you are migrating from a previous version of Small Business Server, two computers running Small Business Server can exist in the domain during the server migration process. For more information about server migrations, it is recommended that you download the appropriate white paper.

• For Small Business Server 2000 migrations, see the Microsoft Web site (https://go.microsoft.com/fwlink/?LinkID=16414).
• For Small Business Server 4.5 migrations, see the Microsoft Web site (https://go.microsoft.com/fwlink/?LinkID=16415).

To continue Setup, do one of the following:

• If you are completing a server migration, only the computer running Small Business Server from which you are migrating can exist in the domain. After removing all computers except the one from which you are migrating, click Check Again to refresh the list of Setup requirements.
• If you are not completing a server migration, remove the existing computers running Small Business Server from the network. After removing the computers, click Check Again to refresh the list of Setup requirements. During Setup, you must create a new Small Business Server domain. The new domain cannot have the same full DNS name for internal domain name or NetBIOS domain name as the other computer running Small Business Server. Additionally, the two domains cannot exist on the same network.

To delete a domain controller account

1. Click Start, click Run, and then type Dsa.msc.

2. In the console tree, double-click the domain, and then click Domain Controllers.

3. In the details pane, right-click the computer name of the domain controller that was removed, and then click Delete.