In order to access and control another server or computer on your network or across the Internet, you can connect via a Remote Desktop (RDP) connection. This is very similar to logging into your own computer, and you will need to have valid credentials (username, password, domain) to log onto the remote computer.
1. In order to make Remote Desktop Connections, you will need to download a free app from the App Store called Microsoft Remote Desktop. Once this is installed, open it up and click on the + New icon in the top left corner.
2. In the popup window you can enter all of the information for the server to which you are connecting. The Connection Name can be anything; it is just used for your own personal reference. The PC name is the name of the server, sometimes called a "Host" or "Host name". Enter the user name, password, and domain (if applicable). Once all of the information has been entered you may close this window.
3. In the main app, the connection you just set up will appear under My Desktops. Double-click on it to initiate the connection.