@David-TP Yes, my satellite units are connected to the main unit via an ethernet cable. Removing that cable and letting it connect wirelessly does allow the guest network to connect correctly....

@Wes_R It is not that it does not see other devices. On just one of the x55 units, it will not even connect to the guest network. If I am near the other two, the guest network is fine. It is like...

System works fine except one of the remote units will not allow the guest network to connect. Any thoughts on what may cause that?