hi,
did this only occur on this particular user or everyone windows machine? any messegas you can see from client side or filer side? does this client use ip_address to map the cifs share or filer_name? is the time sync between filers, DC and client windows?
try this kb and see if it helps? https://kb.netapp.com/support/index?page=content&id=1012788
hopefully useful
thanks
Jeff