NFS Shares backup

hello all, 

we have nfs shares and smb shares in dell emc isilon (power scale).  

i am able to add <domain>\ps-backup in smb shares in isilon and backup exec is able to see those shares and data. 

however NFS shares are different it has only Unix permissions. the default permissions are root account. 

how will i backup from backup exec.  i am able to mount those shares using drive: in windows but backup exec cannot see even mounted shares.

in  job i cannot see shares inside server name. 

server name is smart connect name or vfs name in isilon. 

server name is added however with empty with no information on shares. 

is there any way to backup nfs shares from backup exec. 

Regards