Hyper-V Licensing - Host Product Key and VM Use

I have a server with a Windows 2008 R2 Enterprise license on it.   I understand it will allow unlimited VM's ( barring resources) under license using it's product key but can I install Windows 2008 R2 Standard Edition in the VM's or does it have to be the same edition to use the host product key?
PrimediusAsked:
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BiniekConnect With a Mentor Commented:
You can not use Windows 2008 R2 Enterprise product key for Windows 2008 R2 standard, they are not the same.

Why You will not install Enterprise Edition in vm's ?
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ChrisConnect With a Mentor Commented:
Enterprise only allows for 4 VM's at one time
If you want unlimited that requires datacentre (this is a per processor licence min of 2 CPU's)
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ChrisConnect With a Mentor Commented:
Usage rights state that you should be able to down grade to previous versions of the OS to run as VM's


are you a Volume licence customer or do you have open licences?
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BiniekConnect With a Mentor Commented:
In Windows Server 2008 R2 Enterprise  license with hyper-v role installed,

You can use:
- 4 license for VM's (Windows 2008 R2 Enterprise)
- 1 license for physical server, but it should be only for management ( You can not install, AD, DNS, DHCP etc )

If You want to install services as AD, DNS, etc on physical server, You can do it, but in this case You can use only 3 licenses for VM's

In Windows 2008 R2 Datacenter, You have ability to use unlimited license for VM's



In this article you can find very useful explanation with examples about licensing and hyper-V

Licensing Windows Server in a Virtual Environment
http://blogs.technet.com/b/mattmcspirit/archive/2008/11/13/licensing-windows-server-in-a-virtual-environment.aspx
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PrimediusAuthor Commented:
Ok, forget that number of VM licenses. No worries there as we only plan on having two VM's.  The real question is can I use use the host product key to install a different version of the same OS, in this case standard edition.

irweazelwallis,  I do not know the kind of license as this server is provided by a hosting provider, they have agreed to allow the key to be used in the VM's.  I assume they have a volume license.
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Lee W, MVPConnect With a Mentor Technology and Business Process AdvisorCommented:
If they have a volume license, then the keys should be online at the Volume License Web site.

If not - let me ask - why do you care?  In 2008 R2, Enterprise has ALL the features of any other OS and it doesn't use any additional resources (unless you load the additional roles).  Install 2008 R2 Enterprise and use the Enterprise Key.
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