Hello
I have a question about unity multiplayer
Now I’m working on a report for my game on the steam
I have encountered a problem in unity multiplayer about “ccu” It is limited to 200 ccu
I decided to work on an external server
But I do not know how to do it 
any help on that?
I think you misunderstood something about Unity’s multiplayer services. The ccu limit is the limit for development. It’s bound to your Unity license. You usually “go live” when you release your game. That means there’s no ccu limit but you have to pay for the traffic your game creates.
Read this page, especially “Ready to release your game?”
The concurrent player limits 20 / 50 / 200 only apply to your development license. They are ment for alpha and beta testing. Of course if your game doesn’t sell well you may just stick with what is included in your license. However if the user base grows you want to go live with your game.