Toshiba e-STUDIO556 Service Manual page 778

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Active Directory domain authentication error: invalid realm name
Classification
Network error
Check item
Setting
e-STUDIO556/656/756/856/557/657/757/857
ERROR CODE AND TROUBLESHOOTING
The realm name is invalid and not available for login for Active Directory
domain authentication.
Check if the realm name of this equipment for the Active Directory server is
correct. If the error still occurs, ask your Windows Server administrator.
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Error item
Measures