I have one Adenium at home that is probably dormant, still with full leaves, two that are dormant, and a few seedlings that are "growing"
I was watering when the caudex was a little bit soft, and then it would be firm. I have been withholding water until I can feel the caudex is soft, but now I will continue withholding water until I see new leaves, even if the cause gets a little softer than I was allowing it.