Instead of wrestling with msiexec flags, modern Sophos environments use Sophos Central for push deployment:
No msiexec commands required.
Use silent or reduced-UI for unattended deployment (/qn or /qb).
Supply required dependencies (e.g., .NET, runtimes) beforehand or via the installer properties.
Use centralized deployment tools (SCCM, Intune, Group Policy) and manage updates through the same channel.
Handle reboots explicitly: use REBOOT=ReallySuppress and schedule reboots during maintenance windows.
Validate post-installation: check Outlook add-in appearance, services, event logs, and vendor-specific status tools.
Use msiexec exit codes to guide root cause (e.g., 1603 = fatal error during installation).
If necessary, extract MSI tables with Orca to inspect conditions preventing component installation.
The Sophos Outlook Add-in is a tool designed to integrate Sophos security features directly into Microsoft Outlook. This can provide users with the ability to scan emails for threats, report suspicious emails, and integrate other security functionalities. msiexec qr i sophosoutlookaddinsetupmsi t1 ec3 c1 i1 work