You can try to kill process and launch it later.
Something like this :
kill
foreach (var process in Process.GetProcessesByName("outlook.exe"))
{
process.Kill();
}
launch (don't forget to set pathOutlook
)
ProcessStartInfo startInfo = new ProcessStartInfo();
startInfo.FileName = Path.Combine(pathOutlook, "outlook.exe");
startInfo.WorkingDirectory = pathOutlook ;
Process p = Process.Start(startInfo);