The installation must be run from an elevated command prompt (Administrator).
This is a generic MSI error often indicating that Outlook is running during installation. Use a script to force close outlook.exe before installation.
msiexec /qr /i "C:\Deployment\SophosOutlookAddInSetup.msi" t1=ec3 c1=i1 work Use code with caution. Enterprise Deployment: Logging and Automation
: The specific file being installed, which adds Sophos encryption features to Microsoft Outlook. The Secret "Codes" (Parameters) msiexec qr i sophosoutlookaddinsetupmsi t1 ec3 c1 i1 work
Standard msiexec pattern:
Likely sets the default encryption behavior or level for the add-in. Connection
: Launches the executable responsible for installing, modifying, and performing operations on Windows Installer ( .msi ) packages. The installation must be run from an elevated
If you need those t1 ec3 c1 i1 options, check if they are (e.g., TRANSFORMS="t1.mst" or FEATURE_SELECTION=ec3 ).
The command can be divided into core installer operations and custom Sophos properties:
(Encryption Capability): Defines which encryption methods are available to the user. msiexec /qr /i "C:\Deployment\SophosOutlookAddInSetup
If you are using SCCM or Intune to deploy this, I can provide the specific syntax to use within those platforms. Just let me know which system you are using. Share public link
Specifies a . Shows a basic progress bar but suppresses modal dialogs and the final "Finish" click. /i Instructs the installer to perform a standard installation . SophosOutlookAddInSetup.msi The target database file of the Sophos installer package. T=1
: Often designates a specific Tenant ID , customer token, or regional data center tier where the local client must report back.
: Often defines the Deployment Type (e.g., 1 for Standard/Unattended).
Outlook Add-ins often write to protected areas of the registry. If you run this command in a standard Command Prompt, it may fail due to permissions.