After quite a few emails back and forth with support, nothing seemed to work. The problem has finally been resolved by removing and resetting the satellite Deco units, then re-adding them.

@David-TP Thank you, I didn't think to use each decos IP. All units are now using the firmware provided, however the result is still the same, even after rebooting everything. I can't see the devices...

@ARGamingPK1 They're all V2, it's only showing that due to the firmware. They were bought together in a pack of three, and all state V2 on the bottom.

Firmware is now 1.8.1 Build 20251125 Rel. 35922 - however it appears only the main deco has updated, I applied the firmware via the web interface twice.

@David-TP I've submitted the App log. I updated the firmware using the file provided, this allowed the main deco to see the other two. I then re-applied the firmware so all three units are up to...

After applying the latest firmware offered by the app, my network now shows two Decos as being offline. Everything seems to work fine, but the app refuses to acknowedge "Office" and "Hallway". The...