Very Simple,
Install the client software in the same machine, then config the client, it will ask you to type the user name then, i think you should have admin id, please type what admin name you entered at server configuration time, then next field you need to type the server name ex: "ServerName/Acme" then below there will be tick box called "I want to connect to Domino Server" please check this then click on next it will prompt to you to enter your Admin ID password, then all goes smooth.