So I have been playing a scenario I got through the steam workshop and that had also been posted on the CMO discord called Operation Liberty Dawn.
Now the author has added lasers to several ground units and ships as it is a futuristic scenario. He also put this note on the bottom of the brief:
With his permission I changed some units after my first play through for a bit of fun.5. HELIOS
CMO is a little weird with laser defences. A few versions ago they would auto fire like the Death Star under attack, now it's hit and miss. With incoming Vampires and Fireballs, I strongly recommend you manually target and fire defensive laser systems.
What I found in the original and what I have found in my version (I have not changed any ground unit settings) is that the lasers are not auto firing on cruise missiles or HGVs.
I have attached 2 files.
The first is the original and the 2nd is one of my play throughs.
On my play through find Wake Island. The group labelled Group 5158 on Wake has a laser and if you keep watching it will be under attack from DF-26 missiles. These come in singly, not in a mass attack but still get past the laser. Whereas if you enter manual mode and allocate the laser shots then it hits everytime. Noted the same on ship laser but haven't got a save of anything specific. To replicate that I suggest turning one of the US CSGs west, let it run until they get spotted and watch. That lasers didn't fire for me either.
Many thanks
Sel