Message Cause Solution and reference
"Authentication has
failed."
W0400-202
sAMAccountName was
used as the login user
name when a user in the
child domain logged in
under a parent-child
domain environment,
and ldap_bind failed.
Use UserPrincipalName as the login user
name.
The SSL settings
specified on the
authentication server
and the device do not
match.
Check whether the SSL settings specified on
the authentication server and the device match.
"Authentication has
failed."
L0400-210
The login name attribute
is not specified, or an
attribute on which the
information cannot be
obtained is specified.
Check whether [Login Name Attribute] is
specified correctly.
See "Verifying Users to Operate the Machine
(User Authentication)", User Guide.
"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.
When Other Messages Appear
433
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