NFS configurations are transitioned by the 7-Mode Transition Tool only when certain prerequisites are met on the 7-Mode system and the cluster. If any of the conditions are not met, the tool does not transition the configuration.
Even after client access is disconnected and you prepare to start the export phase, the service must be running on the 7-Mode systems.
The 7-Mode Transition Tool transitions only the persistent export rules that are defined in the /etc/exports file.