@Johan_E 

Hi, nice to see you again.

I saw you also posted here:

https://community.tp-link.com/en/home/forum/topic/844064

As you mentioned, the same email ID is gonna used for both Deco X50-4G and Deco X50-5G. Do you actually want to use different emails for each network?

This is how the Deco APP looks when multiple networks are under the same email ID:

Wait for your reply.

Best regards.

  @Johan_E 

Hi, 

An expired email will not stop the Mesh network from working well. It would only become a problem when you want to change(or forget) the Deco APP login password, as the expired email can no longer receive a verification code.

Deco Mesh network can only be bound to one email ID. If you want to change to a new email, you can still refer to How to change the owner account on Deco APP to change email ID. After Deco is bound to the new email, you would need to log into the new email ID to manage Deco Network on the Deco APP.

Before the expiration of the old email, you can still use it as a manager account if needed:

What’s the difference between an owner account and a manager account?

Best regards.