To automate an outbound message, the administrator should use a workflow rule that defines the criteria for sending the message and the actions to perform when those criteria are met. One of the actions available for workflow rules is sending an outbound message to a designated endpoint URL with specified fields as parameters. Process builder, task assignment, and flow builder are not able to send outbound messages directly. Reference: https://help.salesforce.com/s/articleView?id=sf.workflow_define.htm&type=5 https://help.salesforce.com/s/articleView?id=sf.workflow_action_outboundmessaging.htm&type=5