Msiexec Qr I Sophosoutlookaddinsetupmsi T1 Ec3 C1 I1 Work ✓

Your input:

msiexec qr i sophosoutlookaddinsetupmsi t1 ec3 c1 i1 work

Standard msiexec pattern:

msiexec /<switch> [parameters] <package.msi>

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 msiexec qr i sophosoutlookaddinsetupmsi t1 ec3 c1 i1 work

Replace INSTALLLEVEL and MODE with actual properties from Sophos documentation.

Given the original keyword, here is the most probable valid command an admin wanted to run: Your input: msiexec qr i sophosoutlookaddinsetupmsi t1 ec3

msiexec /i "SophosOutlookAddinSetup.msi" /qr TRANSFORMS="t1.mst" EC3="1" C1="1" I1="1" WORKMODE="1"

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

Without official Sophos documentation, these are guesses:

But these must be passed as PROPERTY=VALUE pairs, not space-separated tokens. A safe, generic example using common patterns and

Example with your terms as properties:

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

The text you provided appears to be a fragmented Windows Installer command line. Here is what the parts mean:

If the installation fails silently (because of /qr), you should generate a verbose log file to see exactly what went wrong. Add the logging switch /l*v:

msiexec /i "SophosOutlookAddinSetup.msi" /qr /l*v "install.log" T1=1 EC3=1 C1=1 I1=1

After running this, open the install.log file in a text editor (like Notepad) and scroll to the bottom. Look for "Return Value 3" to find the error.