I have already learned with my Adeniums, either they fully defoliate or they may retain some leaves, they may even bloom while indoors, but still it is considered dormant. I just keep them dry all throughout, no watering. Got to wait patiently for Spring for new leaf growth before I can resume watering.
At times in late winter to early Spring, I may start amending media if needed, trim roots/some branches if I have too, since I want to keep using same container, lifting the caudex a bit, still no watering if still dormant. Just kept positioned by our south facing window to get all the warmth and sunlight it can get. Test of patience in waiting
Got to wait for outdoor temps to show stable overnight temps of 50F and higher before I let it go outdoors again, and typically this would be by late April to early May in my area.