You should check that GID and UID are synchronised between both systems. 
Could you specify what is failing?   not authorized ? or is and should not 
be authorized... 
Paul
From:   "Mitchell, Dana" <dmitche@xxxxxxxxxx>
To:     Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Date:   19/11/2018 15:23
Subject:        RE: NFS security
Sent by:        "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>
So far our attempts to verify that this works this way have failed.  Is 
there any messages anywhere that would indicate if a match was found and 
used?  Any other diagnostic data available?
Dana
-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of 
Vernon Hamberg
Sent: Friday, November 16, 2018 6:13 PM
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Subject: Re: NFS security
NFS always uses UID or GID (I think) - no matter the platform it's running 
on.
On 11/16/2018 2:52 PM, Mitchell, Dana wrote:
Is there any doc or wisdom that explains better how to secure 
directories between two IBM I systems with an NFS export/mount. 
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