Fujitsu iScanner fi-6010N Operator's Manual page 300

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3. Press the [Login] button.
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If the user name and password are valid, the "Main Menu" screen appears.
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The "Caps Lock" indicator is on if the keyboard's Caps Lock is set.
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The "Num Lock" indicator is on if the keyboard's Num Lock is set.
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If "Global Catalog" is selected for the login LDAP server, the "UPN Suffix"
input field is displayed.
User names including a UPN suffix may be up to 64 characters long.
If a UPN suffix is entered, "@" and the "UPN_suffix" will be appended to
the "User_name".
The entered UPN suffix is remembered and used again at the next login.
For example, if the user name is "user", and "example.com" is entered
for the UPN suffix, it is corrected to "user@example.com".
In this case, this is the "User Principal Name".
A UPN suffix is not required when logging in as a guest. Even if entered,
it will be ignored.