@whiteface pre owned is no problem as it's the user who is registered rather than the unit. Set yourself up and then simply add the new (second hand - reset) decos to your system. It's no different...

@xgaby20 Sorry but I don't know as I'm all Mac. I suspect it will but will probably look a little different on the Android App. I'm sure some of the more knowledgeable on here will be able to advise.

@Kevin_Z Thanks Kevin. I still think it would be easier to be able to change the email address simply by clicking on the owner and changing the address. Perhaps there is a good reason why this is not...

@GeordieDave final message in the saga. TP-Link Tech team have stated that there are only two way to change the Owner email address. 1. Change owner method 2. Complete reinstall of all Decos using...

@GeordieDave So - further update as it appears the TP-Link tech never sleep or have time off: I've had two issues here. 1 - can't change owner email address easily in the Deco App. 2 - Manual...

@GeordieDave so by way of an update: I now have the latest firmware on my 6 Deco units (3 x M9plus and 3 x M5). I also have the latest version of the App on my iPhone. It is not possible to change...