I've dropped a mail to Hik uk support and they're being slow, so i'll try my luck here...
equipment
indoor station + door station
DS-KH6320-WTE1 + DS-KV6113-WPE1(B)
2 users with Hik-connect accounts, say:
user1@myhome.com
user2@myhome.com
user1 is the "admin". This user has setup everything...