Ricoh Aficio MP 161SPF - Manual (Page 156)

Registering Addresses and Users for Facsimile/Scanner Functions
148
7
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.
J
Enter the user code using the number keys, and then press the {OK} key.
If you have entered a wrong code, press the {Clear/Stop} key and then enter
the correct code again.
You can use up to eight digits for specifying the user code.
K
Select [Function Permissions] using {U} or {T}, and then press the {OK} key.