Legacy: Activate and configure Chef Configuration Automation To use Chef configuration automation, set up a user account and optionally set whether to enable change management to control any updates to node definitions. Prerequisites Before you can use the ServiceNow system as a Chef external node classifier, an administrator must: Legacy: Activate Chef Configuration AutomationChef Configuration Automation is deprecated in the Istanbul release. It is still available on instances upgraded from a previous release but is not available for new instances. Activating the Chef Configuration Management plugin, which is available as a separate subscription, also activates the Configuration Automation, Orchestration, and Orchestration Activities - Chef plugins. Chef configuration automation uses Orchestration, which requires a separate subscription. Legacy: Set up Chef key storesThe ServiceNowinstance requires an X.509 certificate to communicate with Chef resources.