I have a scene set up called Good Night that I always activate through Alexa.  I just got a Yale Z wave door lock and want to set it so that it locks with the Good Night scene.  But when adding it there doesn't seem to be a way to set it's status.  I tried a program but you can't use a scene to trigger a program.  So I'm having a hard time conceiving how I would accomplish this.  Any help is appreciated.

Without knowing your ISY version it's difficult to answer the scene/z-wave portion.

 

In any case, you can use a program to trigger a scene.  Just get Alexa to run a Good Night program.

Io_guy is correct. Create a program that controls the scene and then add the program to alexa

One thing you may want to keep in mind, Alexa does not do any security stuff - at least that is what they publish for SmartThings. I added a ST stay mode to the Alexa Good Night and  Alexa disabled it and it wouldn't run. I'm not sure how it knew but it did. Which, in way is a good thing, since Alexa is not tied to a particular person's voice, anyone that Alexa could hear could potentially unlock your door(s).

The ISY doesn't work like that if you use programs to control your devices.

One thing you may want to keep in mind, Alexa does not do any security stuff - at least that is what they publish for SmartThings. I added a ST stay mode to the Alexa Good Night and  Alexa disabled it and it wouldn't run. I'm not sure how it knew but it did. Which, in way is a good thing, since Alexa is not tied to a particular person's voice, anyone that Alexa could hear could potentially unlock your door(s).

 

Doors and locks are not allowed in Scenes in the Alexa service. If your Scene can contain doors or locks, then your Smart Home skill will not pass certification, so I imagine the ISY and probably SmartThings won't return scenes with doors and locks in the discovery payload to Alexa. That said, programs that actuate locks should work fine.