Msiexec Qr I Sophosoutlookaddinsetupmsi T1 Ec3 C1 I1 Work -

Without official Sophos documentation matching EC3, C1, I1, these are likely internal property names from a customized MSI prepared by a third-party or legacy Sophos Central Connector.

Without official Sophos documentation, these are guesses: msiexec qr i sophosoutlookaddinsetupmsi t1 ec3 c1 i1 work

But these must be passed as PROPERTY=VALUE pairs, not space-separated tokens. Without official Sophos documentation matching EC3 , C1

Example with your terms as properties:

msiexec /i "SophosOutlookAddin.msi" /qr T1=1 EC3=1 C1=1 I1=1 WORK=1

A safe, generic example using common patterns and logging: msiexec /i "SophosOutlookAddinSetup.msi" INSTALLLEVEL=3 MODE=Work /qn /l*v "%TEMP%\sophos_outlook_install.log" REBOOT=ReallySuppress Without official Sophos documentation, these are guesses:

Replace INSTALLLEVEL and MODE with actual properties from Sophos documentation.