Verify Your Endpoint
After registering the Event Hook, you need to trigger a one-time verification process by clicking the Verify button that is displayed in Admin Console.
You can also trigger verification later, by going to Workflow > Event Hooks, selecting the particular Event Hook you registered, and selecting Verify from the Actions menu.
When you trigger verification, Okta calls out to your external service, making the one-time verification request to it. You need to have implemented functionality in your service to handle the expected request and response. The purpose of this step is to prove that you control the endpoint.
If successful, Admin Console displays a message confirming that the endpoint has been verified.