After demoting the previous Publisher, you can promote the appropriate SQL Server to Publisher and designate the other SQL Servers as Subscribers to the new Publisher, thus configuring the new replication group.
TIP: After you add a Subscriber, the configuration data stored on the Publisher is replicated to the Subscriber, overriding the data on that Subscriber. Therefore, in order to retain your existing Active Roles configuration, it is advisable to assign the Publisher role to SQL Server that belonged to the old replication group. This ensures that each Administration Service in the new replication group inherits the configuration that was in place when you removed the Subscribers and demoted the Publisher.
To configure the new replication group using the Active Roles Console
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Right-click the Console tree root, click Connect, and then select the Administration Service the SQL Server of which you want to hold the Publisher role.
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In the Console tree, expand Configuration > Server Configuration, and select Configuration Databases.
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In the Details pane, right-click the database and click Promote.
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In the confirmation message box, click Yes.
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Wait while Active Roles performs the operation.
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In the Details pane, right-click the Publisher, and click Add Replication Partner.
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On the Welcome page in the New Replication Partner wizard, click Next.
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On the Database Selection page, click Browse.
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To configure the SQL Server of an Administration Service as a Subscriber to this Publisher, specify the corresponding Administration Service in the Connect to Administration Service dialog. Click OK.
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In the New Replication Partner wizard, click Next, click Next, and then click Finish.
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Repeat the steps for adding a replication partner for each SQL Server you want to make a Subscriber.