The changes entail that the lookup service for registrars and the EPP service display less data for customers for whom you are not the registrar. The registrar-specific WHOIS service (registrarwhois.norid.no) is replaced by the RDAP service.
You can read a full description of the changes in the news article that was sent out earlier this year.
Please contact us on info@norid.no if you have any questions.