In 3.4.1.807 search against "Microsoft and .NET" package source for System.Collections.Immutable fails

[xperiandri]

[rrelyea]

That search works fine on nuget.org source. I suspect that this is not a NuGet UI issue, but rather an issue with the microsoftdotnet feed (https://www.nuget.org/api/v2/curated-feeds/microsoftdotnet/Package/System.Collections.Immutable is not found via a web browser)
-- we are investigating...that web uri may not be the right way to find it..

[xperiandri]

Prism too
But installation works from console

[yishaigalatzer]

This is not a nuget bug, or a 3.4.1 bug. The curated feed does not include all the packages that nuget.org does.

I've emailed the team that owns this feed to see if they want to update it.