To configure OPC UA/DA in IWS for third-party device communication, follow these steps: 1. Open the IWS application and navigate to the communication settings. 2. Select the option to add a new communication driver. 3. Choose OPC UA/DA from the list of available drivers. 4. Enter the necessary connection details for the third-party device, such as the server URL, port number, and security settings. 5. Configure the data points you wish to communicate with by mapping them to the corresponding tags in IWS. 6. Test the connection to ensure that data is being transmitted correctly. 7. Save the configuration and deploy it to the runtime environment. Ensure that all network and security settings are correctly configured to allow communication between IWS and the third-party device.