Some general info
- Each host needs to be licensed.
- A minimum of 8 core licenses is required for each physical processor and a minimum of 16 core licenses is required for each server.
- Core licenses are sold in packs of two.
- Standard Edition provides rights for up to 2 Operating System Environments or Windows Servers containers with Hyper-V isolation when all physical cores in the server are licensed. For each additional 1 or 2 VMs, all the physical cores in the server must be licensed again.
- DataCenter Edition provides rights for unlimited Operating System Environments or Windows Servers containers with Hyper-V isolation when all physical cores in the server are licensed.
- AVMA keys can be used only when the host is DataCenter edition
Also note legal licensing questions are better directed towards your reseller's trained licensing specialist or ask microsoft directly.
https://www.microsoft.com/Licensing/servicecenter/Help/Contact.aspx
https://www.microsoft.com/en-us/about/officelocator/default.aspx
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