If you are using User Account Control (UAC) in your desktop environment, Windows Installer will request that you elevate an installer. The elevation request typically comes at the end of the installation wizard interview, just before the main installation transaction starts.
Tthe Enterprise Vault Add-In Installer has to perform some specific operations that require the installation to be elevated at the start of the installation wizard. For this reason the installer will check to see whether UAC is enabled and whether elevation has already taken place. If UAC is enabled and the installer has not been elevated it will show the following message and quit with an error:
You cannot install the Symantec Enterprise Vault Outlook Add-In by launching this MSI file directly. You must launch setup.exe. For more information, contact your administrator.
To help you work around this issue you can use the setup.exe alongside the MSI packages which...