What is the procedure for licensing windows server if the hypervisor is xenserver or vmware, and not Hyper-V?

Question

Microsoft

I decided to vent the issue of licensing for virtual machines running on Citrix XenServer or VMWare.
There is a lot on the Internet about this, but it is completely confusing.
found this phrase:
"One license of Windows Server 2012 Standard or Datacenter is purchased for 2 processors of a physical host server (it does not matter on the Microsoft Hyper-V or VMware vSphere platform)"
It seems to shed a little light on what is required.
I would like to clarify, I have a Blade Server. If I understand correctly, then I need to buy Std licenses by the number of blades, because. each blade has 2 prots on board. And each license will allow me to run no more than 2 virtual machines on each blade. If I want to run more, then for each blade I need to buy another std license for each blade.
Do I understand the licensing procedure correctly?
Thanks for answers.
PS: I found this article.
At least it says something understandable. By the way, the phrase is taken from there.
Otherwise, nothing is clear on the Internet, and on the Microsoft website itself. There are practically no examples.

Answer 1

It's not easy to call. Called several times and never got a direct answer to my question.
And the question is this: there are three dual-processor servers with the XenServer hypervisor installed, united in a cluster, it is planned to deploy 10 VMs with Windows servers. How many licenses are required, provided that the live migration feature is enabled, including for failover?
The simplest is to purchase 3 Windows Server Datacenter licenses, which will allow you to run an unlimited number of VMs on each server, but their cost is equal to 18 Server Standard licenses.
It would seem that you can simply purchase 5 Standard licenses, which will allow you to run 10 VMs. However, the licenses are tied to a physical server and you won't be able to use the live migration function without violating the license agreement. Since, according to its terms, the transfer of licenses is possible no more than once every 90 days.
It turns out that you need to purchase 15 Standard licenses, 5 licenses for each server. Or at least 9, 3 (6 VMs) per server and configure the migration function so that no more than 6 VMs can be on one server.

Answer 2

The examples given are correct. Microsoft has more than detailed information, it seems clear: http://download.microsoft.com/documents/rus/WindowsServer2012/WS2012_Licensing-Pricing_Datasheet_ru.pdf