I'm setting up a new print server on Debian Bookworm using the latest repo-version of Samba. I got to the point in my documentation where I'm supposed to add printer drivers, but I'm failing. The error happens at the last step of the "Add Drivers" wizard, asking me to specify the location of all the driver files - but no matter what folder I choose, it says it can't copy the file. I have tried copying from the user's desktop as well as from a file server, no change. Below is the log.winbindd file (which I think is where the issue lies): [2023/08/01 14:46:24.187665, 1] ../../source3/winbindd/wb_lookupsid.c:102(wb_lookupsid_recv) Failed with NT_STATUS_INVALID_SID. [2023/08/01 14:46:24.187768, 1] ../../source3/winbindd/wb_lookupsids.c:667(wb_lookupsids_recv) Failed with NT_STATUS_INVALID_SID. [2023/08/01 14:46:24.187812, 1] ../../source3/winbindd/wb_sids2xids.c:765(wb_sids2xids_recv) Failed with NT_STATUS_INVALID_SID. [2023/08/01 14:46:24.187848, 1] ../../source3/winbindd/winbindd_sids_to_xids.c:113(winbindd_sids_to_xids_recv) Could not convert sids: NT_STATUS_INVALID_SID [2023/08/01 14:46:24.187889, 1] ../../source3/winbindd/wb_sids2xids.c:368(wb_sids2xids_lookupsids_done) Failed with NT_STATUS_INVALID_SID. [2023/08/01 14:46:24.216875, 1] ../../source3/winbindd/wb_lookupsid.c:102(wb_lookupsid_recv) Failed with NT_STATUS_INVALID_SID. [2023/08/01 14:46:24.217000, 1] ../../source3/winbindd/wb_lookupsids.c:667(wb_lookupsids_recv) Failed with NT_STATUS_INVALID_SID. [2023/08/01 14:46:24.217055, 1] ../../source3/winbindd/wb_sids2xids.c:765(wb_sids2xids_recv) Failed with NT_STATUS_INVALID_SID. [2023/08/01 14:46:24.217100, 1] ../../source3/winbindd/winbindd_sids_to_xids.c:113(winbindd_sids_to_xids_recv) Could not convert sids: NT_STATUS_INVALID_SID [2023/08/01 14:46:24.217150, 1] ../../source3/winbindd/wb_sids2xids.c:368(wb_sids2xids_lookupsids_done) Failed with NT_STATUS_INVALID_SID. Below is the sanitized smb.conf file: [global] # Printing rpcd_spoolss:idle_seconds=30 printing = CUPS spoolss: architecture = Windows x64 printcap name = /var/run/cups/printcap printcap cache time = 60 server role = member server security = ADS workgroup = EXAMPLE realm = EXAMPLE.AD.EXAMPLEORG.CA interfaces = lo enp1s0 bind interfaces only = yes log file = /var/log/samba/%m.log log level = 1 auth_json_audit:5 # Default ID mapping configuration for local BUILTIN accounts # and groups on a domain member. The default (*) domain: # - must not overlap with any domain ID mapping configuration! # - must use an read-write-enabled back end, such as tdb. idmap config * : backend = tdb idmap config * : range = 70000-99999 # Use idmap_rid for domain accounts idmap config EXAMPLE : backend = rid idmap config EXAMPLE : range = 100000-199999 # Configure winbind winbind nss info = template template shell = /bin/false template homedir = /home/ronb/%U winbind separator = / winbind use default domain = yes # Enable extended ACLs globally vfs objects = acl_xattr map acl inherit = yes store dos attributes = yes client signing = mandatory server signing = mandatory # Turn off NetBIOS, since our clients don't need it disable netbios = yes [printers] path = /var/spool/samba/ printable = yes [print$] path = /usr/local/share/printer_drivers/ read only = no This is running on Version 4.17.9-Debian. I have granted the Domain Administrator the SeDiskOperatorPrivilege and SePrintOperatorPrivilege rights (through the "domain admins" group). What am I missing?