Mounting NFSv4 exports with Kerberos Authentication

Hello, i’ve been having trouble trying to mount an NFS export on TrueNAS Scale that requires kerberos authentication. I have joined my AD domain, checked multiple times if the SPN is registered on the domain controller, set default NFSv4 ACL on the dataset that allows all domain users access to the files, but whatever i try on the client machine i keep getting Operation not permitted. I have enabled GSSD and IDMAPD in my storage configuration and installed libpam -krb5 but i cannot get it to work . Has someone here managed to export nfs shares with kerberos authentication ? Maybe im missing something and i cant figure out what .

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