I have an Azure VM that requires Windows Server 2019 Datacenter installation media, but my licensing is managed through Azure. The evaluation setup disk does not work for what I need. Is there an official way to obtain the full ISO, or can the existing evaluation installation be converted without rebuilding the VM?
3 Answers
If you specifically need a complete ISO rather than conversion, use your organization’s Microsoft licensing portal or open a Microsoft/Azure support case. Azure licensing does not automatically mean you have standalone installation media. Also check whether you only need a repair source for DISM or SFC, since that may require less than a full ISO.
Building the system on a physical machine, swapping the edition, and exporting it back into Azure is technically possible, but it is a much more cumbersome route than converting the existing installation or obtaining the media through official licensing channels.
You may not need a separate ISO. The Microsoft Evaluation Center image is already Datacenter media, and Microsoft documents converting an evaluation installation to a licensed edition in place with DISM. The usual command is `DISM /online /Set-Edition:ServerDatacenter /ProductKey: /AcceptEula`, using the published generic Server 2019 Datacenter key from Microsoft’s KMS client setup key documentation. Make sure this matches your Azure licensing arrangement and verify the activation status afterward.

That worked after I repackaged the WIM and ran setup. Thanks! I also found that the same approach applies to volume-license editions.