This I had to add to
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workgroup = TIMONLINE netbios name = linuxbak netbiosname = linuxbak idmap uid = 10000-20000 idmap gid = 10000-20000 template shell = /bin/bash template homedir = /home/%D/%U winbind enum users = yes winbind enum groups = yes winbind use default domain = yes security = ads
security = ads. Without that, I got all these weird error messages.