iPrint and NDPS are working fine and users are able to print fine but I am getting a ton of Failed Logins reported on my print servers (three of them). These failed logins are from user accounts that are using the iPrint client. The IP address of the failed login is the server's address. I upgraded the clients from 4.16 to 4.20 but no improvement.

NW 6.5 sp5 (had the same issue with sp3)
iPrint (now updated with the latest patches but issue continues)