@HelpFixDecoApp 

Don't worry about it. 

I spent the last 24 hours figuring it out. It is not possible to simply add xe75 Pro to an existing x 50 network. You will never get the six gigahertz band to show. The only way to remedy this situation is to scrap the network remove all units from the existing wireless network. Then create exactly the same set up from scratch using the X e75 pros from the very beginning. It would have been very useful to know this before I wasted all of the time trying to preserve all of my existing network and it's clients only to find that the network that was originally set up under pins the features that are available going forward. So x e75 pros maybe backward compatible however you are restricted to the Technologies that the original wireless network was set up with in this case 2.4 gigahertz and 5 gigahertz bands only.