Use External Objects in Processes and Flows
You can now use external data in flows and processes other than record change processes. This support expands your click-not-code toolbox, letting you build call scripts for support agents with Salesforce and external data, create automated emails incorporating external data, and more.
Where: This change applies to Lightning Experience and Salesforce Classic as part of Salesforce Connect. Salesforce Connect is free for Developer Edition and available for an extra cost in Enterprise, Performance, and Unlimited editions.