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.

  1. Login to Exchange online with powershell
  2. Install the Orca module
Install-Module -Name ORCA
  1. Get the Orca report
get-orcareport

Source:

https://www.productivv.be/2022/12/01/powershell-exchange-online-commands/

https://techcommunity.microsoft.com/t5/exchange/use-orca-to-check-office-365-advanced-threat-protection-settings/m-p/1007866