For businesses that have already purchased a license, the download process is different. If you bought your license through a Volume Licensing agreement, you should sign in to the Microsoft Volume Licensing Service Center (VLSC). This portal provides the specific ISO files that match your product keys. Using a VLSC download ensures that your installation media is compatible with your corporate activation methods, such as KMS or MAK.
For administrators looking to test the OS before purchasing, Microsoft offers a 180-day evaluation version. This is the most common result for public search queries. server 2019 standard download