There are 3 options to choose from…

Index them immediatley: When documents are imported to a cabinet it will open the index Panel for that cabinet straight away.

I will index them later: When importing to a cabinet it will put it straight into the cabinet without asking the user to enter any index values.

Ask me every time: A window will pop up when documents are imported to a cabinet asking the user if they want to enter any index values now or later.