Microsoft internally released the upcoming Windows Server 2019. For those interested below there are download links before they are announced publicly.
Windows Server LTSC 2019, Evaluation 180 days
RTM Build 17763.1.rs5_release.180914-1434
Server with Desktop Experience: Below you will find a complete installation that includes a full graphical user interface (GUI) for customers who prefer it.
Languages: English German
ISO evaluations are for releases Datacenter and Standard
https://software-download.microsoft.com/download/pr/17763.1.180914-1434.rs5_release_SERVER_EVAL_x64fre_en-us.iso
https://software-download.microsoft.com/download/pr/17763.1.180914-1434.rs5_release_SERVER_EVAL_x64fre_de-de.iso
Windows Server 2019 Essentials
OEM RTM Build 17763.1.rs5_release.180914-1434
Window Server Essentials offers a flexible, affordable and easy-to-use server solution for small businesses with up to 25 users and 50 devices. Windows Server Essentials can also be used as the primary server in a multi-server environment for small businesses. Windowws Server Essentials 2019 provides a wide range of new and improved capabilities, allowing small businesses to be more productive.
Desktop Server: Below you will find a complete installation that includes a full graphical user interface (GUI) for customers who prefer it
https://software-download.microsoft.com/download
/pr/17763.1.180914-1434.rs5_release_SERVERESSENTIALS_OEM_X64FRE_en-us.iso
https://software-download.microsoft.com/download/pr/17763.1.180914-1434.rs5_release_SERVERESSENTIALS_OEM_X64FRE_de-de.iso
Microsoft Hyper-V Server 2019, OEM
RTM Build 17763.1.rs5_release.180914-1434
https://software-download.microsoft.com/download/pr/17763.1.180914-1434.rs5_release_SERVERHYPERCORE_OEM_X64FRE_en-us.iso
https://software-download.microsoft.com/download/pr/17763.1.180914-1434.rs5_release_SERVERHYPERCORE_OEM_X64FRE_de-de.iso
Microsoft Evaluation Center https://www.microsoft.com/en-us/evalcenter/
The above ISO is not currently available from Microsoft's site
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- Windows 10 October 2018 Update Installation and a first look
- Windows 10 October 2018 Update Download ISO directly