if you change domain name to a other value then the settings do not get updated
in my case i am behind a firewall , to a local ip
so if i set a domain name ... then it does nothing
if i request a invite to a user , then he get a email like this
"please go to https://10.10.10.2.....&domain=10.10.10.2...."
now it will be hard to reach a private ip space from outside the network
after manual changing the json config file , then the emails are working good
Greets from Powerchaos