Hi all!
We have also struggled with this for quite a while. In the package manager we got a 407 Proxy Authentication Required
error.
So far we have resolved it by adding the following snippet to the C:\Users\USERNAME\AppData\Roaming\NuGet\NuGet.Config
file
<config>
<add key="http_proxy" value="[PROXY_ADDRESS]:[PROCY_PORT]" />
</config>
The <config>
tag is added in between the <configuration>
tags.
We are still to find a solution on how to make this a default value