Authentication with Windows authentication / NTLM

The options "--ntlm --negotiate" and "-u" are required!

1.  By specifying the user name and password   

curl --ntlm --negotiate -u "DOMAIN\NAME:PASSWORD" "http://combitreportserver/api/....."

2.  Use user account of the current process (colon instead of user name & password)

curl --ntlm --negotiate -u : "http://combitreportserver/api/....."