Normally you’d go directly to Downloads and Keys, filter down to what you’re looking for and find your KMS host key over there.That works for the Windows clients as before. On the Volume License Servicing Center you cannot only get the bits but also the MAK and KMS keys. Please note that only Windows Server 2012 (R2) or Windows 8, 8.1 or 10 can act as KMS Service Hosts. This one has tripped up some people when it comes to finding it.
That means that in a corporate environment you’ll need to get your KMS Service updated so you can active the Windows 10 clients. You should be set to go but the final step you need to take is update the KMS Service Host Key. I have done a series of blog post on preparing your KMS environment for Windows 10 activation.