Authoritative DNS Server

All, I'm looking for some assistance how to change Authoritative DNS server to another server in SLES OES and Netware.
Currently we have three server that are handling the NDS two SLES 11 SP3 OES SP2 and one Network 6.5. I noticed that my Network server is still the Authoritative server and I would like to change this function to one SLES servers. .

My apology i'm a newbie in the worlds of SLES and OES.

Any suggestion will be appreciated.