Just now Exchange Product Group announced the availability of the long-awaited Exchange 2019!!!!.
There are several new and exciting features in this release and its the first time that Microsoft recommends install into Server Core!!!.

Here are some of the new features:

1) Exchange Server can use up to 48 processor cores and 256GB of RAM.
2) Dual storage read/write capabilities to Exchange Server 2019 using Solid State Drive (SSD) technology to provide a super-fast cache of key data for improving end user experience

3) Windows 2019 Core support and recommended method of installation

For a full release announcement you can visit this link