You're looking for a way to download the Windows Server 2016 R2 ISO file. Here's some information to help you:
If you're looking for the original Windows Server 2016 release, you can try downloading it from the official Microsoft website. However, you'll need a valid license or evaluation access to get the ISO file. windows server 2016 r2 iso download
Please be aware that downloading Windows Server ISO files without a valid license or for unauthorized use is against Microsoft's terms and conditions. You're looking for a way to download the