Connecting the local server to the application

hello I have installed on ubuntu 18.04 server rocket chat and I need advice how I can assign it to the application which we use already in combination with another company
well thank you

Each client has ability to add additional workspaces. Just click add server

thank you for the answer, but this I tried, but when ladies in the browser’s address so I get but when I enter the same ipadresu server in the application so I can not find the server, I can not find the setup procedure to add this local server.

Ask the server admin for the exact address to use. Sounds like not using the exact address or trying to access a server that is only available inside the network

so I have it set up from subdomain and port 3000 it goes through web interface but when I want to add server to rocketchat application so I write timeout