One of our users managed to hose his contacts by importing an improperly formatted file. He now has 12,000 empty contacts in his addressbook/contacts. Fortunately, we have his original contacts in a .csv file, so the easiest thing would be to simply erase his entire contacts list and import his backup.

I'm surprised and embarrassed to admit that I cannot find any way to simply erase ALL of his contacts and start over. I've googled, read every zimbra doc and wiki that I can find and I guess I'm just missing it.

Would someone point me in the right direction?