I have to use Odata of Creatio environment from Postman using OAuth 2.0 authentication. For that, I have followed a Tech hour session of Creatio Trainers.
Thank you! This message is usually returned in case you are not authenticated. Did you use UserName and UserPassword as a ClientId and ClientSecret and used Basic Auth? And also are you passing a form-data grant_type key in the headers and also using the identity service URL as an endpoint to send request?