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Andre-A-Browne avatar image
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Andre-A-Browne asked yagmoth555 edited

Virtualization of Windows server 2016 and 2019

My question has 2 parts.
Firstly, if I want to add an additional VM what is the smallest license I can stack on an existing server 2016 installation to have it work?
Secondly, can server 2019 stack with 2016 and if so how?

windows-serverwindows-server-hyper-v
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DSPatrick avatar image
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DSPatrick answered Andre-A-Browne commented

Some general info here.
- Each host needs to be licensed.
- A minimum of 8 core licenses is required for each physical processor and a minimum of 16 core licenses is required for each server.
- Core licenses are sold in packs of two.
- Standard Edition provides rights for up to 2 Operating System Environments or Windows Servers containers with Hyper-V isolation when all physical cores in the server are licensed. For each additional 1 or 2 VMs, all the physical cores in the server must be licensed again.
- DataCenter Edition provides rights for unlimited Operating System Environments or Windows Servers containers with Hyper-V isolation when all physical cores in the server are licensed.
- AVMA keys can be used only when the host is DataCenter edition

https://download.microsoft.com/download/7/C/E/7CED6910-C7B2-4196-8C55-208EE0B427E2/Windows_Server_2019_licensing_datasheet_EN_US.pdf
http://download.microsoft.com/download/7/2/9/7290EA05-DC56-4BED-9400-138C5701F174/WS2016LicensingDatasheet.pdf

--please don't forget to Accept as answer if the reply is helpful--






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Thanks @DSPatrick Do you know if I can add a server 2019 license on a machine running 2016?

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You're welcome.

Do you know if I can add a server 2019 license on a machine running 2016?

I'll assume you're asking about adding a 2019 guest to a 2016 hyper-v host. You can but you'll need a valid 2019 product key in order to activate it.









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Well not quite. I understand that the licenses work for 2 VMs per host. So is there a way to stack the 2019 license on a host that is already running 2016? Or do I need to buy 2 new 2019 licenses

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DSPatrick avatar image
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DSPatrick answered Andre-A-Browne commented

Not sure what is meant by "stack the 2019 license" but the Server 2016 license would not cover a Server 2019 virtual machine guest, nor would the Server 2019 license cover the 2016 guest unless a DataCenter host was used.









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This is an excerpt from a windows guide on per core licenses:
"Standard edition has rights to use two OSEs or two Hyper-V containers and unlimited Windows Server containers when all cores on the
server are licensed (subject to a minimum of 8 core licenses per physical processor and a minimum of 16 core licenses per server). Once
a server is licensed, customers may wish to license the server for additional OSEs or Hyper-V containers. This practice is often referred to
as “stacking”, and is allowed with Standard edition."

I want to know if a 2019 license can 'stack' with a 2016 license as they reference there

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DSPatrick avatar image
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DSPatrick answered DSPatrick commented

Ok, yes this is not a problem.

Standard Edition provides rights for up to 2 Operating System Environments or Windows Servers containers with Hyper-V isolation when all physical cores in the server are licensed. For each additional 1 or 2 VMs, all the physical cores in the server must be licensed again.


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You're quite welcome.

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yagmoth555 avatar image
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yagmoth555 answered yagmoth555 edited

I want to know if a 2019 license can 'stack' with a 2016 license as they reference there.

To answer you on that specific sub-question, if you run 2019 instance inside that host, you need the physical cores covered, so yes you need license.

1) If you respect the number of VM, 2 total, the 2019's licence got downgrade option to cover a 2016's OS, but that mean you got a limit of two VM in such case.

2) If you want 2 2016 VM, and 2 2019 VM,you need the physical core covered by the 2019 and 2016's license, yes.

Don't forget that if it's the first 2019 licence you get, you probably need 2019 users CAL too


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