CmdID / PowerShell / Cmdlets / Preview
Preview-QuarantineMessage
Use the Preview-QuarantineMessage cmdlet to preview the contents of quarantined messages in your cloud-based organization. Exchange PowerShell reference
From the Exchange PowerShell reference 3 parameters Its page in the reference
Parameters
-IdentityThe Identity parameter specifies the quarantined message that you want to preview.-EntityTypeThe EntityType parameter filters the results by EntityType.-RecipientAddressThe RecipientAddress parameter filters the results by the recipient's email address.