https://stackoverflow.com/questions/53784440/wcf-on-net-core-missing-client-negotiate-scheme-in-authorization-scheme Well its too bad if another project is already written and it works on localhost but not on server :D Anyway I solved issue by reading article: blogs.msdn.microsoft.com/distributedservices/2009/11/10/… which solved my problem I found this article which offers solution for my iss...