i pre ordered the digital version of the ultimate edition. I’ve now installed everything including Halo Wars 2, welcome to the ark, and Halo Wars: Definitive Edition. My Xbox is telling me HW DE is only 10mbs which I known isn’t true as it’s a whole game. And even in my games and apps it’s not there. I’ve done a reinstall and it still says 10mbs. I searched the HW2 menus and still haven’t found where to start HW DE.
So it turns out a code will be sent to you from Xbox live, which will then allow you to launch/Download Halo Wars DE. It took about 6 days to receive my code after I installed Halo Wars 2