I have web app that I am adding DocuSign Embedded Signing to that is used both on Desktop as well as Mobile device. I have been told that the iframe solution of SOAP API is unreliable (as I have also experienced). I am attempting to implement a solution and prefer using SOAP API. I am using the SOAP API Embedded Signing example provided with the SDK.
If I assign the user security token to the iframe src attribute, the iFrame successfully loads the embedded view. If I try to Response.Redirect to that user token (just a URL) then the page comes up with the DocuSign Logo and error message that says the Session has expired.
What settings or changes need to be made so that I can use the SOAP API and redirect to browser rather than iframe? Is there a different way to request the user security token? do I need to set up different callbacks?