Exchange server 2013 manual Scan agent update : Which engine(s) to update

I’m manually updating Malware  agent, with “Update-Engines.ps1” script.

Should I include all engines or are all required, or I should use  only Microsoft Engine

Flowing are options for  defining a specific engine(s) update : Microsoft, Command, VBuster, Kaspersky, Norman, Wormlist, Cloudmark