Ricoh IM 550 Series, User Manual, Page: 284 / 344

Message Cause Solution and reference
"Authentication has
failed."
W/L0406-003 ":" or other characters
that cannot be used in a
login user name was
entered. • Enter the correct login user name.
• Change the user name if it contains a
space, ":" or other unusable characters.
"Authentication has
failed."
W0406-101 Too many requests for
authentication occurred
at one time. Try again later. If the problem persists, check
whether the machine is under an authentication
attack. The attack status can be checked by the
screen message, in the system log, or in the e-
mail notification sent to the administrator.
"Authentication has
failed."
W0406-107 A user group cannot be
obtained. Check whether the group name registered on
the machine is correct and whether the DC
settings are configured correctly.
*1
Kerberos Authentication
has failed. Check whether the realm name registered on
the clock at the KDC (key distribution center)
and the clock of the device are
synchronized.
*3
No connection is
established to the
authentication server. Enter the server IP address in [Settings]
[Machine Features Settings] [System
Settings] [Interface Settings] tab [Ping
Command] to check whether a connection can
be established to the server.
The domain name is
incorrect or cannot be
resolved. Check whether the domain name registered on
the machine is correct and whether the name
can be resolved.
*2
The login user name or
password is incorrect. Check the login user name and/or password
of the user registered on the server.
"Authentication has
failed."
L0406-200 Too many requests for
authentication occurred
at one time. Try again later. If the problem persists, check
whether the machine is under an authentication
attack. The attack status can be checked by the
screen message, in the system log, or in the e-
mail notification sent to the administrator.
9. Troubleshooting
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