Authentik LDAP vs. TrueNAS Directory Service

Has anyone successfully been able to configure Authentik 2025.6.3 with TrueNAS Scale 25.04.1? I’ve followed the generic LDAP configuration as well as SSSD integration guides - and can get it to add the directory successfully but users cannot authenticate - it returns bad username or password, despite valid credentials.

Authenticate to which service? AFAIK SMB only supports Active Directory.

UI authentication with LDAP / AD is an enterprise-only feature. Since Authentik probably doesn’t provide a KDC, I think NFS / SMB authentication with it are probably impossible as well.

Can you see the users from Authentik in TrueNAS?

Never used Authentik before, but I have always thought it was an all-in-one solution. Quite surprised that it lacks a KDC.