Hell, I can't explain it any more clear.
I have an Office installer. But that doesn't matter. I have a MSI installer, which I need to get to install invisible. The problem is that I can't use the /QN parameter.
More in-dept, if I use the /QN parameter, the install will deinstall when it encounters an error. When I use any other parameter (like /QR and /SB, the install gets paused and an error popup shows. I NEED that popup, so I cannot use QN. Yet, however, I also NEED to let it install without seeing it. Tricky one huh?