Assume you have downloaded the official Volume License ISO from VLSC. Here is how to turn it into a functioning KMS host.
Before downloading and flashing your ISO, ensure your hardware or hypervisor meets the minimum baseline requirements: Minimum Requirement windows server 2019 kms iso link
Microsoft protects its Volume ISOs behind authentication (login to VLSC or Visual Studio). You cannot legally bypass this. If you do not have a Volume License agreement, you must use the Evaluation Center ISO or purchase a license. Assume you have downloaded the official Volume License
Downloading Windows Server 2019 ISO: Official and Secure Methods You cannot legally bypass this
Log into the Microsoft 365 Admin Center, navigate to Billing > Your products > Volume licensing , and select Windows Server 2019.
You're looking for information on Windows Server 2019 KMS (Key Management Service) and how to obtain an ISO file. Here's some helpful content: