Qt Creator does not work behind a NTLM-credentialed proxy server

Being behind such proxy server, Qt Creator simply cannot access Internet. Whether it is cloning Qt Design Studio components or connecting to license check server, as long as it's about Internet Qt Creator fails. And since Qt Creator has no specific settings for proxy but just accepts whatever system configuration is, I'd say there is no workaround for now. Unfortunately, some of commercial users are using such proxy.

Update:
1. Git is out of our hand and not our problem. Besides, with proxy set separately it works well from Qt Creator. So problem solved.
2, Yet still, license check does not work behind such proxy. According to original reporter, other applications, e.g. browser, do NOT explicitly ask for credentials since username and password have been set in system network settings already. So those credentials are just used as they are. Then it is strange that Qt Creator does not work in that way. By design, Qt Creator should just silently use what is provided by system as other apps do (so we should not expect any connection error).