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  • Datacenter allows unlimited Windows Server VM's on the same hardware.  The only other purchase would be your CALs which are needed for all devices or users.

    The only other thing to purchase would be RDS CALs if planning on using RDS.  Other Microsoft products have their own licensing - Exchange, SQL, etc.

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  • Brief reply... The hpe link gets it right, HPE themselves have misled you. on STD license you only need 4 lots of 16 core. U want 3 VMs of windows, so 2x16 licences the host once for 2VMs, then buy it again to get 4VMs.

    Note Datacenter usually only works out cheaper at approx 12VMs - use a calculator to check.

    Most industry pros would advocate esx over windows as the hypervisor if security and vulnerabilities were a concern. You should consider the pain of windows updates on a host as reboots will require downtime.

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  • Thanks m@ttshaw and Da_Schmoo

    m@ttshaw, I am still unsure about the number of OSE licenses in Windows Server Standard.  I've not read that I can buy additional OSEs beyond the 2 OSEs referenced seemingly everywhere.  Is that the OSEs are additive, just the case that you get 2 VM OSEs per 16-core license?  So, you say that to host the above list of VMs I need 4 16-core licenses, does that get me beyond the 2 VM OSE, to what number of permitted VM OSEs, 6 VM OSEs or 8 VM OSEs?  

    I just want to be within MS' license compliance.  Not everyone operates with an enterprise agreement with MS.  It seems that MS could further their customer's license compliance by just providing a calculator which customers could list the number of VMs and cores per VM and host cores/processors on a Windows host and provide a complete authoritative answer.

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  • You license all cores in the hardware.  If you are not virtualizing, you are done at that point.  IF you virtualize, you are allowed 2 OSE's of Windows Standard.  If you want 3-4 Windows Server guests, you double your license.  if you want 5-6 guests, you triple, and so forth.

    Here's a license calculator:

    https://techlibrary.hpe.com/us/en/enterprise/servers/licensing/index.aspx

    and another:

    https://www.trustedtechteam.com/pages/calculator-questions

    At some point, usually around 12 Windows Server guests, it becomes cheaper to purchase Datacenter which allows unlimited Windows Server guests on that one physical box.

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