I was tripped up by the Windows 11 22H2 login issue discussed in detail here: https://lists.samba.org/archive/samba/2022-October/242239.html I installed Samba 4.16.5 from bullseye-backports on all our servers and clients can now login and authenticate using passwords. Progress! However, most of our users are setup to use smartcard authentication and when I try that on a 22H2 machine that I joined to our domain I get the message "A null reference pointer was passed to the stub" and smartcard authentication fails. Any ideas/suggestions? I'll be happy to provide confs and log files and to test suggested fixes. -- Barry A. Trent 952-829-5864 x109 barry.trent at atcorp.com