Have only recently noticed that our printers have been deploying without the -o auth-info-required=negotiate option (kerberized cups). Checked and rechecked and triple checked and it appears Casper Admin (8.52) isn't capturing this option. I can't say anything about previous versions working or not as we were using ksmbprintd up until recently.
Simple fix is to throw this command into the policy (Advanced | Run Command);
sudo cat /etc/cups/printers.conf | grep "<Printer" | sed -e 's/<Printer //;s/>//' | xargs -n1 lpadmin -o auth-info-required=negotiate -p
Hope this helps someone.