Ricoh Aficio MP 161SPF - Manual (Page 262)

Registering Addresses and Users for Facsimile/Scanner Functions
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7
F
Press the {OK} key.
G
Press [Details].
H
Select [Auth. Protect] using {U} or {T}, and then press the {OK} key.
I
Select [Folder Protect] using {U} or {T}, and then press the {OK} key.
J
Select [On] using {U} or {T}, and then press the {OK} key.
K
Select [Destination Protect] using {U} or {T}, and then press the {OK} key.