Dear all, I only find really old forum entries for this, therefor I would like to ask for help. I have a Ubuntu Server 22.04 running with Samba (4.15.13 (nothing newer available via apt)) bound to AD using winbindd. Integration via SSSD was not working for me. SSSD however is used for ssh authentication. I can create a share now and authenticate via the samaccountname, but I would like to use the UPN. The special situation is that the ad domain and the domain part of the UPN differ. How can I use the UPN to login? This is working via SSSD and SSH just fine for example. Can winbind find a user object via UPN and resolve this to the samaccountname, so the user can use UPN instead of sama. If so, how? Any advice to integrate Samba with SSSD then? Is Winbind really best practice? It feels really limited. Samba is always complaining about winbindd not running when having winbind uninstalled and still with idmap setting set to "sss". Best, Leon