Validate Your Connections to External Object Data
Test and troubleshoot your external object connections using validator, a built-in diagnostic tool. With just a few clicks, validator checks that your external object from Apex and OData data sources is connected and responding properly. If the test isn’t successful, you get easy-to-understand messages to fix the connection.
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.