Cannot be started in physical at the same time as virtual.
Standart
It does not limit the number of users, but unlike the ones described above, you will have to purchase client licenses. Supports up to 4 TB of RAM, and also each purchased license applies to two processors. There is Hyper-V that allows you to run two virtual operating systems simultaneously on the same physical hardware.
DataCenter
The most expensive version and how whatsapp number list the price corresponds to the best itself. It is identical to the standard, but there is one significant difference and it is that you can run an unlimited number of virtual instances. This, in turn, can save the company money.
Many companies that have only recently started their operation decide to refrain from using this OS because in their opinion it is expensive and they do not need it at the moment. On the one hand, they may be right, because if you have only 5-10 employees, then you can work from a laptop, and if your employees are still the most loyal people on earth, then you don't have to worry about a data leak. However, let's take off the rose-colored glasses and look at the world through the prism of reality, and the reality is this: everyone is looking for their own benefit and can sell information to a competitor, the laptop may break down and all data will be lost forever, you will not be able to help an employee with a question due to the lack of remote access and other sad points. To avoid all this (And most importantly, to avoid data leakage, for example, accounting), you need to purchase a Windows server, it will allow you to restrict access to some files, save data in the cloud and not worry about leakage, and also have access to employee systems.