How to Determine the Server's Fully Qualified Domain Name
A Windows server has a fully qualified domain name that your network uses to send messages and use its resources. A quick way to view the fully qualified domain name is using the "ping" command in the Windows command line utility. The fully qualified domain name (FQDN) is the standard "computer_name.domain.com" format where "computer_name" is the name given to your server when you installed Windows.
Click the Windows "Start" button and enter "cmd" into the text box. Press "Enter" to open your Windows command line utility.
Type "ipconfig" and press "Enter." This displays the IP address for your Windows server. Use this IP address to view the fully qualified domain name of the server.
Type "ping -a IP" where "IP" is the IP address for the computer. Press "Enter." The "-a" switch returns the domain name of your server.