Hello,
Hope your issue has been resolved and sorry we have not hear back from you. I will link some guidance below for reference and please let us know if you are still blocked by this.
If you received auth issue but you think you have input the correct SAS, please check if you have the correct CORS setting.
Batch Inference repo: https://github.com/Azure/MachineLearningNotebooks/blob/master/how-to-use-azureml/machine-learning-pipelines/parallel-run/README.md
Troubleshooting guidance: https://learn.microsoft.com/en-us/azure/machine-learning/how-to-debug-parallel-run-step
Hope this helps.
Regards,
Yutong