i know it's an old thread but I have same need. We have an old fas 2040 with ontap 7.3.4 ( ..!! yes.. ) and the problem is,
we have also an old,ancient NT4 domain with samba 3.x ( ...again ...! ). Now we have deployed a new Active directory Domain using Samba 4.8 . When I tried to join the old FAS to the new domain i had every kind of problems ( pdcbroken, NETLOGON pipe STATUS_ACCESS_DENIED, etc. ) so i came back to old domain. Since it's not an easy task to try ( many users connected, 400+ shares active... ) I would like to retry the active directory join with simulator. Our version is 7.3.4 , our company does not have intention to update it, probably we will buy a new one in the 2020 ( we already use an aff200, another fas 20xx updated, a SAntricity , etc. ) Problem is i have to shut down the old samba NT4 domain in a couple of months, so simulator could help a lot.