This is a video showing how to install Exchange Server 2019 onto Windows Server 2019, with all of the steps involved onto an updated system that is already a domain controller. There are some requirements that need to be installed first and you also have to search for the Exchange 2019 iso, because Microsoft have decided to hide it on their site, so that you need to have a subscription to be able to download it from them. They seem to be doing it because they want Exchange 2019 to be the last one that companies can use on their own servers, with the next version maybe being a cloud version that only can be run from Microsoft or a cloud provider. They most likely want to do this so that they can reduce their support costs and then get rid of more workers, which seems to be something that a lot of big companies are trying to do. Don't be surprised if the big companies are even trying to develop some AI robots who can do the work instead of humans.

https://go.microsoft.com/fwlink/?linkid=2002913

https://www.microsoft.com/download/details.aspx?id=34992

Install-WindowsFeature Server-Media-Foundation, NET-Framework-45-Features, RPC-over-HTTP-proxy, RSAT-Clustering, RSAT-Clustering-CmdInterface, RSAT-Clustering-Mgmt, RSAT-Clustering-PowerShell, WAS-Process-Model, Web-Asp-Net45, Web-Basic-Auth, Web-Client-Auth, Web-Digest-Auth, Web-Dir-Browsing, Web-Dyn-Compression, Web-Http-Errors, Web-Http-Logging, Web-Http-Redirect, Web-Http-Tracing, Web-ISAPI-Ext, Web-ISAPI-Filter, Web-Lgcy-Mgmt-Console, Web-Metabase, Web-Mgmt-Console, Web-Mgmt-Service, Web-Net-Ext45, Web-Request-Monitor, Web-Server, Web-Stat-Compression, Web-Static-Content, Web-Windows-Auth, Web-WMI, Windows-Identity-Foundation, RSAT-ADDS

Microsoft-Exchange-Server-2019-x64-cu1.iso
ExchangeServer2019-x64-cu1.iso