You must register a bulletin board box for storing a document beforehand. Follow the steps below to register the box.
Select Fax Box > Polling Send/Board from the home screen.
Select one of the boxes named Unregistered Bulletin Board.
If a password entry screen is displayed, enter the password.
Make settings for the items on the screen.
Make the appropriate settings such as Notify Send Result.
If you set a password in Box Open Password, you will be asked to enter the password from the next time you open the box.
Select OK to apply the settings.
To display the screen for changing settings or deleting registered boxes, select the box you want to change/delete, and then tap 
.