Xsan Quotas by script

does anybody know how to set xsan quotas via a script/list of users. I wish to apply a quotas to a set of users that are allowed to use my xsan. These users are located within the institutes active directory. However I want to pick out around 3000 users from a list of 40,000. I have a text file which contains the list of users I wish to add to my xsan and have been trying to use the cvadmin cli to try and create quotas for them but without luck. It creates the first quota then fails on all others. Obviously I don't want to try and have to add them one at a time and thought that someone may have an idea that I could implement to achieve my goal.