To re-configure the Oracle service group, delete the existing service group and recreate it using the Oracle configuration wizard.

While deleting the service group from wizard, the database and listener processes are stopped. Also, the IP resource goes offline and thus the virtual IP becomes unavailable. Before running the Oracle service group configuration wizard, the listener and database processes should be running. To start the listener process in virtual context, create a temporary service group with an IP resource, bring it online, and start the Listener process from services.msc. Once the process is started, delete the temporary service group without taking it offline and proceed with the Oracle service group configuration wizard.