Hi @or.tamer ,
- For Om-Prem the end points you need to use are different.
Auth URL - https://{Orchestrator_URL}/identity/connect/authorize
Token URL - https://{Orchestrator_URL}/identity/connect/token
and also Grant type - Authorization code supports only user scope
if you are looking to add other scopes then use Client_Credentials grant type - Redirect URL is the Callback URL that you see in Postman. Please copy the same and paste it in Orchestrator Redirect URL field

Cheers