Canon i-SENSYS MF729Cx Important Safety Instructions And Installation Manual page 180

The Address Book data is exported to the specified location.
Changing Location to Save Address Book Data
1
Open the printer folder.
2
Right-click the fax driver icon for your machine and click [Printing preferences].
3
Click the [Select Destination] tab
4
Click [Specify a Folder].
Displaying the Printer Folder
[Edit Address Book].