Network Installations are more complex than Standalone Installations.
PLEASE READ THIS DOCUMENTATION BEFORE YOU INSTALL A NETWORK LICENSE..
Note: Network Administrators [' I.T. '] should not give the Product Key to users, as they may try to install a standalone copy - which they cannot.
Network Licenses are also called Floating Licenses.
Network Installation: Step by Step - Summary of Steps
Network Installation: Detailed Instructions - More information for Network Administrators