Ricoh Aficio MP 1600 General Settings Manual page 157

D
Select [Program/Change] using {U} or {T}, and then press the {OK} key.
E
Enter the registration number you want to change using the number keys
or the Quick Dial keys, and then press the {OK} key.
You can automatically specify registration numbers 001-032 by pressing the
Quick Dial keys.
Press [Search] to search by name, destination list, registration number, user
code, fax number, or folder destination.
F
Press the {OK} key.
G
Press [Details].
H
Select [Auth. Info] using {U} or {T}, and then press the {OK} key.
I
Select [User Code] using {U} or {T}, and then press the {OK} key.
Authentication Information
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