NFSv4 for Isilon settings issue

Recently try to setup NFS share for Isilon where NFS server is NFSv4. We have issue mounting the share even with non-root user, and see permission nobody/nobody. That does not happen with NFSv3. The NFS server belongs to a domain. To fix the issue, enter the domain name in NFSv4Domain field. However, we have a server belongs to multiple domains. We test it by setting it back to localdomain in NFSv4 and enable NFSv4 no name. Now, we don't have any issue with mount for NFS share in Isilon.