I have followed the "Windows: Add the feed to your NuGet configuration" instructions above with no success inside Visual Studio version 15.9.5. I have unselected the nuget.org from the "Available package sources" in VS2017 Tools -> Options -> NuGet Package Manager -> Package Sources. I followed the "upstream sources" instructions (steps 1-3) above to run the "Install-Package AutoMapper -Version 8.0.0" command in Package Manager Console. The AutoMapper shows up in my Installed list of packages but never in my Browse list of packages (even if I uninstall it from my solution). Any help getting nuget.org packages into my private package feed would be helpful. We are trying to create a single source for our NuGet packages by using this feature but we cannot browse upstream sources and get the packages into our private feeds.
⚠Do not edit this section. It is required for docs.microsoft.com ➟ GitHub issue linking.
Hi @teamboyd , you'd probably get better traction with product issues at the Azure DevOps Developer Community, as it's actively monitored by the product team. I'll add @mitchdenny to take a look for ya cause we want to get it figured out! I'd still probably post to the dev community though just in case :)
Upstreams doesn't pass search requests on to the upstream source. So if you want to install a package that is coming in from an upstream you need to explicitly add it.
Is this on the feature list going forward? Without upstream searches, the developer experience is less than acceptable.
This seems to be a product issue and has been/should be passed to the Azure DevOps Developer Community. If there is any further feedback on the docs site please open a new issue.
Thank you all for the feedback!
@teamboyd I don't know if this discussion was continued in a topic at Azure DevOps Developer Community but I've made a way around by configuring a single source in my nuget.config file but keeping both nuget.org and a private source in my solution.
nuget.config
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<packageSources>
<clear />
<add key="feed-poc-03062020" value="******" />
</packageSources>
</configuration>
solution sources

This way, you can install packages by using nuget.org gallery but the first nuget restore or dotnet restore command will download the package into your private source to be used by your application, and all restores after this one will download the package from your private source.
Most helpful comment
Is this on the feature list going forward? Without upstream searches, the developer experience is less than acceptable.