Renaming the cifs server name is easy.  On Unisphere -> NAS Server -> Sharing Protocol , Rename the CIFS Server (name) and provide the domain admin password again to Apply. This will not affect the shares and will be accessible by the new cifs server name.
Hi I have smb nas sever with 10 share I want to replace the name of the nas server How i can do it without destroy my shares ?
nas server