License for companies

Hello everybody,
I have a short question:

Is this usage for companies with 8 accounts, allowed on my own server and also free of charge? I do not want to make a mistake here because of the license.

Which kind of license is the one you are using? (Enterprise?)

If you are using the community you can have as many users and configuration free of charge.

i want to use the free version (Basic) on my server with desktop Clients for Windows and Android