ModernBill V4 Domain management.
If you want your clients to manage their domains i.e change contact information and change DNS server then please do the following step:
Go to system config >> Registrar Modules >> Client Domain Options >>Allow Change Contact Info = Yes >> Allow Register Name Server =Yes then save the setting to resolve your issue.
Take a look at -
http://manual.modernbill.com/adminhelp/english/Configuration/Domain_Settings/
Registrar_API/eNom/module_enom.htm#domainrenewals









