If you try and activate a WIndows 2019 server using a (valid) MAK key, it fails. it’s a known bug and folks have been very vocal on a lot of communities.

At this stage, I’m also aware only of the command prompt workaround (cscript c:\windows\system32\slmgr.vbs /ipk <product_key>).


Its not the issue of the key itself but in the design from what I understand. So, I don’t believe you’d require a new set of keys as the old ones do work. Just slmgr command line is the way to go

Windows Server 2019 Activation Issues

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