Licensing Windows Server Essentials 2019?

Good day. The question arose about the need to purchase the licensed version of Windows Server.
Plan to take the Essentials edition, which has a limit of 25 users.
Actually a question: one copy of Essentials is limited to 25 users, if we in the future want to expand the organization to, say, 50 users, will I be able to buy another copy of Essentials and re-enter it in the domain?

And the question is a little aside: does it make sense to raise a second domain controller on Linux? Whether there will be a limit of 25 users?

Thanks in advance for your answers and help
April 3rd 20 at 17:29
2 answers
April 3rd 20 at 17:31
Solution
1. No, you cannot. From Essentials of restriction on the number of domain users (it accounts, not real users. When you try to create a new snap-in will pop up) . Besides, if essentials is a domain controller, it should be the only domain controller on the network and bilateral relations with other CD can not have. If the number of users will increase, your choice - switch to standard edition and above.

2. As a second controller in linux you can use if the forest level 2008r2 does not exceed, in the case of a domain on Samba. About FreeIPA can't say anything. My opinion - or so entirely on the Linux directory, and RADIUS to lift, or the entire AD. Full redundancy in a hybrid circuit to achieve, I believe, unrealistic. In the framework of the organization would not tolerate such perversions.
Interestingly, "the only domain controller" is not technically feasible? or just the snap-in will pop up?
You have put this revision? - cole.Stracke commented on April 3rd 20 at 17:34
Set, but in 2 CD have not tried stands.
After a short gugleniya found the following:
All the same, you cannot use the configuration in 2КД, with the exception of the 21 day trial period on migration. The production network Essentials should be the only KD. https://docs.microsoft.com/ru-ru/windows-server-es...
When you write is technically feasible, compare that with your initial task is to purchase a licensed version of Windows ie as I understand it, to legalize the use of the software. From this and need to play. Technically, you can use multiple instances of Essentials on the same network, but it will not expand the limit on the number of users and devices will not allow you to install the domain controller role on two OS instances - one server will be a member of the domain without roles. Besides, even if the trial period when 2кд can be on the same network recording service directory can be located only on the 1st server from the second they simply disappear (from the comments of other users). Also, load balancing will not be a domain member can connect to only one server, you hands will not transfer all roles to another server. If you find a way around the 21 day trial period and cunning to use a configuration in 2 CD is very unlikely to be correct from the point of view of licensing... and the loaf, trolleybus and hereinafter.
If you have more than 25 users within the same network - zakladyvaytes on a standard, CAL and RDSCAL, if you need them. If you want a second CD - buy another standard license, and put on a separate physical server. It is the right thing, in terms of licensing and best practices. Perhaps Azure AD can still give some advantage, but I'm not aware of. - dominique73 commented on April 3rd 20 at 17:37
April 3rd 20 at 17:33
If I remember correctly - essential is the ceiling of one domain controller and 25 users and even without the ability to build trusts with other domains....

Here is what is the mechanism of this restriction - "you must in words" or "technically impossible" - do not tell. In the second case, will have fun with storage uchetok fired...

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