I am trying to test ES upgrade from 2.2 to 6.4 on windows. The remote requires NTLM authorization. I am passing username and password but looks like it takes basic auth. In ES log I am seeing "NEGOTIATE authentication_error: Credentials cannot be used for NTLM authentication". How do I change the authentication type to NTLM from basic auth in _reindex body? This is what I am providing in postman-
POST /_reindex
{"source": {"remote": {"host": "http//...:, "username: "myuser", "passowrd": "mypasswd", "domain": "mydomain"}, "index": "myremoteindex"}, "dest" {"index": "mylocalindex"}}