When trying to access a Samba share from a MacOS machine you will get “access denied” or similar messages.
The UCS share resides on a NFSv3 share which is provided by a third server. So the Samba server re-exports the NFS directory as Samba share to the MacOS client.
NFS v3 does not support Access control Lists (ACL) as needed by Windows and MacOS.
Migrate the data to a local drive (non-NFS) and export it as Samba share
Migrate the share to NFSv4 as it supports ACLs