@rcoan As others have found, password requirement is enforced by Deco app, not by X50 firmware. It used to be that Guest Network didn't require password at all. If you can find install file of older...

@John_Reading In Deco app it should show connection type for Satellite Deco. In example below Bedroom Deco connects by WiFi, Office Deco connects by Ethernet:

@LiaLin Also, one more question: what is switch brand name and model number?

@neilbaker86 To make sure everything is fine with your Deco mesh setup in general, question: did you name your Satellite Deco as "Deco_71A0" and "Deco_7434?" Because, usually if everything is right,...

@LiaLin This is unusual, especially for Deco mesh running in Access Point mode. Just to make sure I get everything right, two questions: 1. If you power off two Satellite Deco, will remaining third...

@LiaLin Do you run these in Deco default Router mode or in Access Point mode? Also, check this TP-Link FAQ, and in it Section Q2: General questions about Ethernet Backhaul feature on your Deco