C++ Does pointer of pointer automatically have access to new value?

I am having a hard understanding of how pointers to pointers should work, like in the following example.

let's say I have in a class in a certain file the following

typedef object*    objectPtr;

and another file containing

struct RandomStruct
{
    RandomStruct( objectPtr* obj = NULL ): ojbOwner( obj ) {}
    objectPtr*     objOwner;
}

I use both of these as members of another class and construct them like this

Constructor():
objectPtrMember( NULL )
, RandomStructMember( &objectPtr ){}

I then proceed to update my objectPtrMember variable through an editor at runtime to point to an object, and where my logic tells me that objOwner would be updated as well, since it points to objectPtrMember which was updated through the editor, my editor program says otherwise as objOwner stays NULL.

is there something I may understand wrong about pointers ? or am I just not doing the right thing ?