API calls using proxy authentication

Hi All

Need help in making API calls using proxy authentication. While making calls through postman too, I need to add proxy server, username and password in the postman settings then only the API call works.
How can I do the same in uipath.
I tried using proxy-authentication header , as well as modifying the UiPath.config file to add proxy details…Also tried to add proxy settings in IE but still getting the error 407 firewall authentication required


Have a view on this docs and configure the required settings


I already checked these links but the solutions do not work for me. We are using the robots in user mode (no orchestrator) so as suggested as per the above links, made changes in IE proxy, even windows credentials manager and whatever is suggested but nothing seems to work