[Samba] "Failed to convert SID" Errors for Some Users on UNRAID with Windows AD Domain.

[Geoff Bland]

Thanks for the offer to check out the Unraid SMB configuration files.
As requested, any values in <>s have been replaced with tokens rather the real values.
Contents of  /etc/samba/smb.conf (it is indented like that in the file)
[global]        # configurable identification        include = /etc/samba/smb-names.conf
        # log stuff only to syslog        logging = syslog at 0
        # we don't do printers        show add printer wizard = No        disable spoolss = Yes        load printers = No        printing = bsd        printcap name = /dev/null
        # disable aio by default        aio read size = 0        aio write size = 0
        # misc.        invalid users = root        unix extensions = No        wide links = Yes        use sendfile = Yes
        # ease upgrades from Samba 3.6        acl allow execute always = Yes        # permit NTLMv1 authentication        ntlm auth = Yes
        # hook for user-defined samba config        include = /boot/config/smb-extra.conf
        # auto-configured shares        include = /etc/samba/smb-shares.conf Contents of /etc/samba/smb-names.conf
# Generated namesnetbios name = <UNRAIDHOSTNAME>server string = <Unraid Server Description>hide dot files = noserver multi channel support = nomulticast dns register = Nodisable netbios = Noserver min protocol = NT1local master = yesos level = 100security = ADSworkgroup = <SHORTDOMAINNAME>realm = <FQDOMAINNAME>null passwords = Yesidmap config * : backend = hashidmap config * : range = 10000-4000000000winbind use default domain = Yesldap ssl = Nont acl support = Yesacl map full control = Yesacl group control = Yesinherit acls = Yesinherit permissions = Yesmap acl inherit = Yesdos filemode = Yesstore dos attributes = Yesmap archive = Nomap hidden = Nomap system = Nomap readonly = No
Contents of /boot/config/smb-extra.conf (looks like any "extra configuration" from the Unraid Settings page just gets dumped in here, you can see the lines I added here):
[global]idmap config * : backend = tdbidmap config * : range = 1000-4000000000#unassigned_devices_start#Unassigned devices share includes   include = /tmp/unassigned.devices/smb-settings.conf#unassigned_devices_end
The file /tmp/unassigned.devices/smb-settings.conf is empty.

Contents of /etc/samba/smb-shares.conf is just a list of Unraid shares that are exposed over SMB, for example;
[LanCache]        path = /mnt/user/LanCache        comment = Cache for downloads from Steam, Origin, Epic, Frontier, Microsoft etc.        browseable = yes        case sensitive = auto        preserve case = yes        short preserve case = yes        writeable = yes[MySQL]        path = /mnt/user/MySQL        comment = MySQL Database Backups        browseable = yes        case sensitive = auto        preserve case = yes        short preserve case = yes        writeable = yesetc...