I'm setting up a journey in SFMC, and I want to define exit criteria for when a subscriber is no longer present in the Data Extension that serves as the entry source. Specifically, I want to know if using Journey Data in the exit criteria, with the condition SubscriberKey IS NULL, will remove a contact from the journey if they are later removed from the entry Data Extension (but have already entered the journey).
Is this the correct approach? Or should I be using Contact Data instead to ensure that the subscriber exits the journey when they no longer exist in the entry source Data Extension? I want the user to automatically exit the journey if they are removed from the source Data Extension at any point after entry.
Thank you for your guidance!