Avast not updating automatically
In the event that it does, neither How to Ubuntu, eustasy, nor avast!guarantee any protection or prevention by following these steps.If your computer is connected to the Internet, the automatic update feature allows the security application to check the availability of a new version for the definition files every four hours, without requiring user interaction.
It performs an incremental backup, which means that the name for the new threats are added to the existing signatures.
That's quite an endeavor for 500 PCs and a strange requirement for a centrally-managed enterprise antivirus solution. Avast kindly offers free licenses to educational institutions (we're thankful!