How do you disengage alarm on outback legacy 1998?

To disengage the alarm on a 1998 Subaru Outback Legacy, insert the key into the driver's door lock and turn it to the unlock position. This should deactivate the alarm system. If the alarm continues to sound, you can also try starting the engine with the key, which may reset the alarm. If issues persist, consult the owner's manual or a professional for assistance.