Windows 10: Windows server 2019 Datacenter will not re-activate following server rebuild

I have Windows Server 2012 Datacenter Retail installed on a HP Proliant Gen10 Microserver.It activated fine the first time I built the server.I have wiped and reinstalled the same ISO of Windows and the same original activation key but although the server is successfully connected to the internet and resolves addresses, I get an error when trying to activate using the same key as before that claims the activation servers cannot be reached, error code 0X87E10BC6Any ideas? please

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Activate Windows Server 2022 Datacenter on Hyper-V Host with Windows Server 2019 Datacenter

Hi!

I tried to aktivate a new VM on my Hyper-V Host.

The Hyper-V Host is a Windows Server 2019 DataCenter Core.

The new VM is a Windows Server 2022 DataCenter (with GUI).

For the activation by Host i use the AVMA-Key for Windows Server 2022 DataCenter but the Server couldn´t be activated with this key.

Why? Isn´t possible to use a WinSrv 2022 DC as guest on a WinSrv 2019 DC Host?

***** moved from german to english Community *****

 

windows server 2019 datacenter,windows 10 LTSC activation

Hi Gents,

in my organization we have windows server 2016 datacenter

and we activate windows 7 and windows 10 enterprise and bro from windows server 2016 datacenter kms host key,

we need to install windows server 2019 datacenter to activate windows 10 LTSC 2019,

my questions are?:

1- will we lost activation of windows 7 and windows 10 "old laptops"

2- activation of windows 10 LTSC just in windows server 2019 data center KMS ? and not possible in windows server 2016 datacenter?,

3- what is the problems that will face if we upgrade our windows server?

 

Windows Server 2016 Datacenter activation

We acquired a license for Windows Server 2019 Datacenter but we need to install Windows Server 2016 Datacenter. What is the procedure to convert the Product Key for activation?