Celerra NS 40G, the configured Domain is disconnected , customer have new Domain

customer have Celerra  NS40G, they have disconnected / removed the Domain. They have new domain.

But they have not configured in the Celerra, Now they are not able access the CIFS share, I tried with device IP, but it is looking for login name / password.

Any Idea how to get the access to this CIFS file share  ?

Do we need to have remove the old domain and add the newdomain ?, Old Domain does not exists

some one know the procedure, please let me know.

thank you