I am having the same problem after upgrading to WHM 11.23.0 cPanel 11.23.1-R24893. Account creation fails. Is anyone here using this version of WHM able to successfully create accounts?
I would be very interested in whatever you come up with. I moved away from OpenSRS about a year ago but I still have about 1,500 domains registered with them. I have been looking for years for a system that would intergrate OpenSRS domain management with our billing system -- it would make it so much easier for our OpenSRS clients to manage their domains.
It's not possible. OpenSRS does not give resellers the same level of access that Enom does. Only the registrant/admin contact can change the username or password for a domain.