What does the user limit in Win Srv 2019 Essentials apply to, concurrent connections or existing accounts? [duplicate]

Solution 1:

Got an answer elsewhere which suggests what I expected already: It's really about the count of users created in this edition of Windows, regardless if or how those interact with the server:

On a Server Essentials 2019 it is the actual user count in the active directory

That makes perfect sense with what the error message tells me. What a mess... :-) Would have been of help if MS would check this restriction when actually creating a new user instead of letting things look like all is fine, while it actually isn't. I'm not allowed to e.g. create too long usernames in the corresponding UIs as well, this restriction is not too different.