For many the anticipated wait for Exchange 2019 Public Preview has finally launched.
You can now install Exchange on Windows 2019 Server core and also on the GUI. To learn more about the new features in Exchange Server 2019, head over to the Exchange Team Blog below:
https://wwwblogs.technet.microsoft.com/exchange/2018/07/24/exchange-server-2019-public-preview/
You can download the preview here
Take note that this is still in preview build, I encourage you to first test this in your lab and wait for the full version later this year before introducing it into your production environment.
If you want to dive into an install, take a look at Jeff’s blog here to view a step-by-step guide on doing this.
http://www.expta.com/2018/07/how-to-install-exchange-server-2019-on.html
Hope it helps.