Hi Sam, After putting in a ticket with Dell, it was related to KB 000033501 - Dell EMC UNITY, VNX: AS400 SMB Client Access Denied to Unity/VNX CIFS Share (Dell EMC Correctable) Our previous AS400/iSeries (that is working) is on OS v7r1 and must be running local authentication on the NAS. This new build AS400 that was having the problem is OS v7r3 and defaults to SMB2. One of Dell's engineers updated the parameters on our NAS and the shares started working to our AS400 again.  
Hi folks, Am wondering if anyone out there has experience with Unity and IBM iSeries? I have a customer who is running an iSeries on V7R3 (internal disk) and are trying to connect to a Unity file share via QNTC. The file share is mapped but none of the directory structure is displayed. Per IBM's instructions, the user connecting to the share is the same and has the same password. Wireshark traces to the share from the iSeries show the Unity sending a [FIN, ACK] after credentials are sent. Customer has this working with Synology and other Windows servers with no problems. Any ideas? 
Unity 300 SMB share and IBMi Series