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Hyper-V Licensing Question

I am just trying to get some clarification on the Hyper-V Licensing as I can't find this anywhere.
could someone confirm the following:

If you are running Server 2008 R2 Datacenter as a hyper-v node, can you then run any version of server 2008 (standard, enterprise, datacenter) as a guest operating system.  You can also run unlimited # of these on that host, without licensing the guests individually yes?

I have seen articles that state you can run an unlimited # of guests, but not tell you what OS's you can use for the guests, or if they need to be licensed individually.  

could someone clarify that.
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beaconlightboy
Asked:
beaconlightboy
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2 Solutions
 
TheCleanerCommented:
Yes, you are correct.  Any version of the server (standard, enterprise, datacenter) as well as any year (so W2k3, W2k8)

To quote Microsoft:

One instance of the server software in the physical OSE, and any number of instances of the server software in virtual OSEs.

and MS allows for "down versioning" of any server OS license...so with Datacenter:

DOWN-EDITION RIGHTS
You may run an instance of Standard or Enterprise in place of Datacenter in any of the OSEs.

Look at the licensing site for MS, virtualization rights, and the PUR (product use rights)
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beaconlightboyAuthor Commented:
Is there a special license code?  we have been using our enterprise open license codes for our servers to date as i figured as much
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Nothing ever in the clear!

This technical paper will help you implement VMware’s VM encryption as well as implement Veeam encryption which together will achieve the nothing ever in the clear goal. If a bad guy steals VMs, backups or traffic they get nothing.

 
TheCleanerCommented:
Special license code?  Not sure what you mean.
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kevinhsiehCommented:
With that many servers it makes sense to use KMS server for windows activation. When you setup the KMS server, you the KMS key for your datacenter license. The KMS server will authorize all windows server installations in your enterprise, and all down level servers (standard, enterprise, and 2008 versions of the same).  
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beaconlightboyAuthor Commented:
I see, so the Datacenter code works for all versions?
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kevinhsiehCommented:
Yes.
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TheCleanerCommented:
Oh, you were talking about keys for activation...my fault.

See here:  http://www.microsoft.com/windowsserver2008/en/us/downgrade-rights.aspx

Scroll down to either OEM or volume licensing depending on which one you are (near bottom of page).

If you are still in doubt, I would contact your Microsoft account rep, especially if you have a volume license (EA, Open, Select) and verify your options with them.  The licensing support staff can assist as well.

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TheCleanerCommented:
Just FYI...it's up to you how you assign points, but Kevin is also correct that a KMS service in house works well.  If you're a small shop it's unnecessary but if you have hundreds of activations it works very well.
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beaconlightboyAuthor Commented:
Oh, I didn't notice the different name, i thought there was only two of you.  can i fix that?
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TheCleanerCommented:
If you want to change point assignments you'll need to click the "Request Attention" box directly below your original question.
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kevinhsiehCommented:
I think that KMS is worth it at about a dozen machines.
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