OneFS 8.1.0.4 NFS export group limit

Hi,

I just created few NFS4 exports on our Isilon system (onefs 8.1.0.4), all exports are working fine but I do have a problem with the nfs-group limit (16).

I already changed global:

     Map Lookup UID: Yes

Still the same problem, only 16 groups, any ideas?

Thanks