CIFS mount on Oracle Linux 7 using winbind authentication needs carry over user permissions

We're looking into moving away from ocfs2 and NFS mount points and going strictly to CIFS for shared common directories on a NetApp filer.  We are also using winbind for user authentication.  I can set up the mounts in the fstab similar to:

//server.domain.com/directory     /directory     cifs     credentials=/root/.creddir/.credfile,_netdev,uid=username,gid=group 0 0

Reading the man page for mount.cifs indicates that if I user the multiuser option it should pass along the user accessing the share if set up as:

//server.domain.com/directory      /directory     cifs     multiuser,credentials=/root/.creddir/.credfile,_netdev 0 0

but when I su to another user I get permission denied.