Canon MF6180dw Manual page 357

NOTE
If you have selected [Reenter Fax Number before adding Destination to [Destination List]] in the [Security Settings] dialog
box of the [Special] tab, the [Confirm Password] dialog box is displayed when you click [Add to Destination List]. For
details, see the online help. (See the
When setting the destination name from the address book:
Click [Address Book] in the [Sending Settings] tab.
Select the recipient -> click [Add to List] -> [OK].
"Viewing the Online Help (PC Fax).")