Unfortunately the whole point of the security update was to change how name lookups work. There is more information on the changes in the upstream advisory here:
https://www.samba.org/samba/security/CVE-2020-25717.html -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1954342 Title: Client authentication error "Failed to convert SID ... to a PID" To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/samba/+bug/1954342/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs