Monitor how many "units" or seats are consumed by your various server instances. Renewing and Upgrading Your License
Despite best efforts, activation can fail. Here are the most frequent messages and solutions: Eset Server Security License Key
A quick search on torrent sites or warez forums might tempt you with "cracked" or "keygen" versions of Eset Server Security. Here is why that is a catastrophic business decision: Monitor how many "units" or seats are consumed