Vagrant through proxy and NTLM?

Question

linux

Hello!
At once I will tell - in network administration I am not strong at all.
You need to raise the vagrant virtual machine through a proxy.
I used vagrant-proxyconf and set the environment variables.
However, the network on the virtual machine still did not work, with the following error:
407 Proxy Authentication Required
As far as I understand, this is due to the use of Forefront TMG.
Further, I found that this problem is solved using ntlmaps - but how exactly is not described anywhere.
Please tell us in a nutshell how it works and how to set it up.