Mobile device management solution preferences
You can create references to mobile device management (MDM) servers, which your iOS devices and Apple TV contact for enrollment in MDM. From the Apple Configurator 2 
menu on your Mac, choose Preferences > Servers. You’ll need the following information:
Description: A name for the server, which may be based on location, grade level, or something else easy for you to remember.
Enrollment URL: The fully qualified domain name (FQDN) or IP address of your MDM server. Apple Configurator 2 attempts to ask the MDM server for the full enrollment URL.
If the default FQDN or IP address doesn’t return the correct information, consult your MDM vendor.