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Have you tried using the Sharepoint connected system in a process model to retrieve the document? docs.appian.com/.../sharepoint-connected-system.html
Thank you for your reply how to connect this connected system to IDP OR RPA
Start with a process model and use it to orchestrate the different activities. Pull documents from Sharepoint, pass them to an RPA process, run document extraction on them, or whatever steps are needed.
Read the design patterns here: docs.appian.com/.../design-patterns.html