The files can be downloaded directly from Microsoft. To download the files, register to be a part of the Insider Preview Program. Registration and Download information can be found here ( -us/software-download/windowsinsiderpreviewserver).
Click on below button to start Windows Server 2019 Jan 2019 Edition Free Download. This is complete offline installer and standalone setup for Windows Server 2019 Jan 2019 Edition. This would be compatible with 64 bit windows.
Windows InsiderPreview Server 17623.iso setup free
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