ORCA is a project to help Office 365 tenant administrators validate their anti-spam and anti-malware settings against recommendations from Microsoft. ORCA is installed as a PowerShell module with just one cmdlet. After running Get-ORCAReport, you’ll have a report containing recommendations and observations about your configuration.
I was surprised to see version 2.0 out. I didn't think development was continuing but I was wrong. The 2.0 version has a nicer look but not much else new. We went from 14 recommendations to 15; 45 ok to 47 ok.