Where do I place the input file for bulk user creation?

From Karoshi Linux Wiki

First you need a CSV file with the students firstname and surname. You can then either by a client machine or on the pdc, place the file in the itadminshare.

On a client machine this share is mapped for you if you log in as an itadmin user, on the server the share is in: /home/itadminshare/bulk user creation/input files/

Once you have put your buc input file in the correct area you can use the dialog from karoshi management to process the file and then create the users.