What action should be taken if an XML payload does not appear on the form during the Exploration Phase?

The correct choice involves scripting a new custom sensor correctly. In the context of ServiceNow Discovery, if an XML payload is not appearing as expected during the Exploration Phase, it typically indicates that the existing sensor—responsible for parsing the payload and extracting relevant data—is not functioning properly or is misconfigured.

Creating or scripting a custom sensor allows the user to tailor the data extraction process specifically to the needs of their environment. By ensuring that the sensor is properly constructed, the necessary XML payload can be accurately processed and displayed, facilitating the successful discovery and population of the Configuration Management Database (CMDB) with relevant information.

Re-running the entire discovery process would be a less efficient solution, as it does not address the root cause of the issue with the sensor. Resetting the MID Server might also not resolve the underlying problem if the sensor itself is incorrectly configured. While verifying user access to CMDB is essential for successful discovery, it is not directly related to the issue of an XML payload not appearing. Thus, scripting a new custom sensor correctly directly targets the problem, making it the appropriate course of action.