Enter your alarm code into your ADT alarm keypad and then press "Code" or "8." Your alarm code key should be a four-digit number.
Choose and enter a two-digit number to save as the new user's ID after you have pressed "Code."
Enter in a four-digit number that you want to give the temporary user to use as their code.
Enter your alarm code for a second time and then press "Code" again.
Allow the alarm system to register and wait for it to beep one time. The system will take about 3 seconds to register.