How do I shut off an output in my mobile app? i.e. You have an audible alarm going off that you would like to shut off.

DISARMING does not shut off outputs. 

How to set rules for outputs video 

In order to shut off an output with a strobe, siren/audible alarm, you will first want to check if there is a sensor tripping the output.  

Usually a security sensor, high water sensor, or bilge sensor will be going off that is tripping the output. 9/10 time it's a security sensor.  

You will then click into the sensor tile> click into the rules tab> and check if there is a runtime set for the output. If there is a run time such as 30secs, the output will be triggered for 30 secs.  

If there is no run time set the output will be triggered as long as the associated sensor is in alert.

So if it is a door sensor that the output (ex. Audible alarm) is tied to then the output (ex. Audible alarm) will trigger for as long as the door is open.

If you want to override the settings within the tile you will want to use the commands page of the mobile app to toggle the output on or off. 
Output 1 is the purple wire on harness 1.

Output 2 is the white wire on harness 1.
You cannot switch an output on or off simply by arming and disarming.