I have to use an older version of Xamarin.iOS (10.12) because our Mac building server runs on an older version, the problem is that I am not allowed to update the Xamarin.iOS framework on the Mac.
I wasn't able to find older installers for Visual Studio 2017 nor Xamarin. There was also a blog post about the Xamarin Updater but the extension is no longer available.
Is it possible to downgrade Visual Studio 2017 and/or its components and if yes how?