All new API applications must use the OAuth 2.0 flow for authentication as DocuSign legacy authentication and OAuth 1.0 will no longer be accepted for new applications after October 2022.
The legacy X-DocuSign-Authentication header will not be supported in any form, including XML, JSON, SOBO, or OAuth v1 token formats.
Impact on your Customization
Any customization for Send for DocuSign OOB features, Custom UI implementation to Send for DocuSign, and Custom Authentication will be impacted if the API applications are not updated from 1.0.
After installing DocuSign packages and configuring the DocuSign system properties, perform the following tasks: