Hey @isrgff,
No, slave zones are not reflected in the UCS interface. Besides, it would add nothing as this zones are only included as read-only - nothing can be changed within UCS. The settings for these zones will continue to be carried out on the DNS master - in your case, AD DNS. Microsoft fully supports the use and integration of BIND into its DNS scheme. As with any product integration, however, there are some limitations and configuration issues that must be addressed. From the syslog message I guess the master (your AD DNS) is not configured to allow transfers. Therefore, I would assume that the master DNS must be configured. A (in my opinion) rather good tutorial on this can be found at Linux and BIND9 as a DNS Secondary for Active Directory – vswitchzero
However, this is not really a UCS specific topic anymore, since it is now merely a standard bind integration.