Changing Windows Server Edition - Vastier/sysadm GitHub Wiki

I recently ran into a similar issue with Server 2019 Eval. I called Microsoft, twice, and they both stated it was not possible to convert from 2019 Eval to Standard. I knew that sounded bogus and was eventually able to resolve. Posting here in case it helps anyone in the future.

# ISO Used: 17763.253.190108-0006.rs5_release_svc_refresh_SERVER_EVAL_x64FRE_en-us.iso

# Commands Executed:

DISM /online /Get-CurrentEdition
DISM /online /Get-TargetEditions
DISM /online /Set-Edition:ServerStandard /ProductKey:N69G4-B89J2-4G8F4-WWYCC-J464C /AcceptEULA

slmgr.vbs /upk
slmgr.vbs /ipk <MAK_KEY_HERE>
slmgr.vbs /ato

# Initial Product Key is GVLK (unable to find official source at present)

Unofficial GVLK Source

Product	GVLK
Windows Server 2019 Datacenter	WMDGN-G9PQG-XVVXX-R3X43-63DFG
Windows Server 2019 Standard	N69G4-B89J2-4G8F4-WWYCC-J464C
Windows Server 2019 Essentials	WVDHN-86M7X-466P6-VHXV7-YY726
Windows Server 2019 Azure Core	FDNH6-VW9RW-BXPJ7-4XTYG-239TB
Windows Server 2019 Datacenter Semi-Annual Channel (v.1809)	6NMRW-2C8FM-D24W7-TQWMY-CWH2D
Windows Server 2019 Standard Semi-Annual Channel (v.1809)	N2KJX-J94YW-TQVFB-DG9YT-724CC
Windows Server 2019 ARM64	GRFBW-QNDC4-6QBHG-CCK3B-2PR88

Source Here.