To configure ACL for Nutanix array:

1. Logon to the prism console.
2. Open the file servers list, and click the file server where you want to create your SMB shares.
3. Select User Mapping in the Protocol Management link in the right corner.
4. Click Next multiple times, till the Explicit Mapping dialog appears.
5. Click Add One to One Mapping and add your domain user and add NFS ID, save and click Next.
6. You must add one domain user to the default mapping. Save the details.
7. Click Manage Roles in right pane for selected file server.
8. Add your domain user in the Add Admins section and select Role as Backup admin: Backup access only
9. Save and close the dialog.