Hi Team,
My name is Hadrian and I work for NetApp doing clustered Data ONTAP consulting.
That is an interesting BURT that may be relavent. Before going to Support, I would validate any legacy AD computer objects referring to the old CIFS server name have been cleaned up (aka Deleted), and the AD replication updated. Then repeat setting up the CIFS server. If after that the issue persists I would call into NetApp support and refer to the BURT 649007 so they can inspect the logs.
If this helps, please hit "Accept as Solution" and hit the Kudos button.
Cheers,
Hadrian