The command you shared is the standard unattended installation string for the Sophos Outlook Add-in, typically used by IT admins to deploy the software across multiple machines without user interaction. Command Breakdown
T1 could be a property name.EC3, C1, I1 could be values defining feature states (often 1, 2, or 3 correspond to "Not Available," "Local," or "Source")./) before the property name (e.g., T1="ec3"), MSI would interpret ec3 c1 i1 work as the name of the file to install, which would result in an error.Regardless of the syntax intricacies, the target of this installation is the Sophos Outlook Add-In. msiexec qr i sophosoutlookaddinsetupmsi t1 ec3 c1 i1 work
From similar Sophos or Outlook add-in MSI installers: The command you shared is the standard unattended
msiexec /i "SophosOutlookAddinSetup.msi" /qn /norestart