Microsoft Azure has a rich set of documentation, including architecture guides, tutorials, and how-to articles. Here are areas of the Microsoft Azure documentation that may be useful for the ThingWorx Azure IoT Hub and ThingWorx Azure OPC UA integration, from the more general to specifics:
Here are links to the Microsoft Azure and other documentation for procedures related to setting up the ThingWorx Azure Industrial IoT OPC UA integration:
Here are links to other articles specific to tools used in the integration and Microsoft documents that may be of interest: