Hi,
In my experience, this is not a strict limit on the number. It depends on your physical server scene. At the same time, the number of virtual machines, I have some suggestions.
In Hyper-V server, we recommend that each physical CPU core corresponding to four virtual machines. In other words, a quad-core CPU, we recommend that physical machine up to 16 virtual machines created. In my experience, this is a good performance status.
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