I am having the same problem as mentioned here http://serverfault.com/questions/100153/one-user-always-unsuccessfull-in-logging-into-the-mfp-via-dss.
One user tried scanning from the printer and it asks for the user name and password while scanning then it gives an error like invalid user name and password.His login credentials are fine for other printers and his machine and other users dont find any problem with this printer.
Please help
