Stuck with Isilon SMB Share

hello, new to Isilon and struggling to do anything with it, Dell did a dump and run project, so we have no documentation and my trawling of the web hasn't brought anything back that I can use.

Issue: Create a SMB share, set everyone to full control as I would for Share permissions, I am unable to add NTFS permissions to the top level like I would on a windows file share.

I am wondering if anyone can help me here?

what I would like to setup is

Share permission : everyone Full Contorl

NTFS permission : Specific AD Group read only access to the top level, then I can create sub folders with additional AD groups for read or modify, everyone group not able to access it

Add share to DFS

is this possible? any help would be most appreciated