Spark 2.8 login problem solved, but no search and muc

Thanks. This solved the issue. My server name is shown as "domain.com" while the DNS A record points to "jabber.domain.com". How do I change the server name in OF 4.0.0 to match "jabber.domain.com"?

EDIT - While it allows me to log in, search (for users) and conference are broken and cannot be used....