I have run in the past with some issues where clients were unable to update their IP in the DNS servers. This solved my problems:
Create a new GPO and assign to the domain.
Browse to Computer Configuration / Policies / Administrative Templates / Network / DNS Client and configure the following:
Please note : updating PTR records is not yet supported by Samba, see:
https://bugzilla.samba.org/show_bug.cgi?id=10876
sponsoring the work the implement this by some Samba developers is welcome.
Caponato's Samba notebook. Start here or else Main menu