Sorry Sweets, been absent too long.. Listen , D convos? They have to stop. He issuing her to get all the info back to you without having to tell you. This is not fair to your D at all.
This has to be a boundary now. Sit H down and tell him it is inappropriate to treat your D like an adult confident, but at same time, manipulate her like a child. I suggest family counselling right away.
I know this is tough, hang in okay?
Your D does not seem to be gaining any real quality time with her dad, so less communication is not a bad thing if she doesn't want to see him. Can always block text number as well if absolutely necessary and he does not respond well to the set boundary.
But try to see counsellor first, then you have an opening with " the counsellor feels that...." And trust me the counsellor will have big things to say on this!