To rename the netbios name of a OES host or a cluster resource, perform the following:
Leave the domain. For more information, see Leave a AD Domain.
Using iManager, rename the netbios name also known as CIFS Virtual Server Name. For more information, see Setting CIFS General Server Parameters in the OES CIFS for Linux Administration Guide.
Reconfigure NSS AD. For more information, see Reconfiguring NSS AD.