Adding a secondary domain problem


when I tried to add new secondary domain to our GW system, install procedure finally displays this error: Error adding secondary domain. The domain object is created, but staying in pending state. MTA agent is failing to start, only admin service is running.
Our GW system was migrated from 2012 several months ago and everything is working fine. I also have one GW8 domain (running on NetWare) for administrative purposes (I can't really forget C1). I also tried to create a new domain from C1 connected to secondary domain but got an error saying not enough rights.
So my question is where can I check the reason the secondary domain wasn't created successfully. Also I've noticed the new domain is created only inside GW system, there is no new eDir object created and no eDirectory information in it's properties. Is that correct?

Best regards,