I've received an email to say I've been disconnected
Change of ownership
This indicates that another user has claimed ownership of the purifier by registering it to their own account.
Only one individual can claim ownership of a certain purifier serial number. When someone adds a purifier to an account within the Dyson Link app, any previous user information will be wiped and an email notification sent to confirm the change.
NB: If you wish to have more than one device control the same purifier, each device will need to use the same Dyson Link app log in details.