Hello,
According to the documentation appears that only AGOL Hosted services are currently supported by Data Pipelines. Our organization is using Distributed Collaboration to connect our Enterprise Portal with our ArcGIS Online account. When adding service that's been shared via distributed collaboration, we see a token issue in Data Pipelines (even though authentication has been passed when adding layer to Pipelines).
Even when service via enterprise is shared Publicly we still encounter an Error-

Please consider supporting these types of services as they are crucial for many organizations like ours.
Thank you,
Amanda Huber