Windows 2019 is now available in preview ,you can download and install it in your test environment to discover the new features provided by this new version:

Introducing Windows Server 2019 – now available in preview

In this article I would like to show you ,what we have to prepare in your existing forest to install the first domain controller on Windows Server 2019.

  1. Forest Functional level:

    The Forest Functional Level must be 2008 or higher.

    If you still have a domain controller in Windows Server 2003 you have to demote it before, to be able to upgrade the forest functional level to Windows Server 2008 or higher:

  2.  SYSVOL replication:

    If you still use FRS for SYSVOL replication , you must migrate to DFS before.

    FRS is not supported by a domain controller on Windows Server 2019:

  3. Upgrade Schema version for Windows Server 2019:

    The new schema version for Windows Server 2019 is 88: