I’ve managed to get TrueNAS connected to Active Directory and created a share that I can access from an AD account on a Windows client just fine. However when I try to mount the share on Ubuntu Server 24.04 I keep getting permission/logon failure.

In my fstab entry I’ve tried every combo I can think of.

domain=domain,user=user,password=pass domain=domain.local,user=user,password=pass user=domain\user,password=pass user=domain.local\user,password=pass

I’ve also tried a separate credentials file with every one of those combinations as well as versions 2.1 and 3.0. I’ve got no problem mounting shares from the Windows server without even specifying the domain.

At this point I’m pretty sure I’m missing a setting on TrueNAS but no idea what. Any ideas?