Im useing Debian 12 on both, the client and the domaincontroller. Samba version on both is 4.21.1 from Debian backports. Creating a GPO creates /etc/motd but not /etc/issue and also the sudoers file in /etc/sudoers.d are not created. samba-gpupdate --force and then samba-gpupdate --rsop are showing the content of the GPO, for both /etc/issue and sudoers. Restarting winbind on both is not fixing the problem.
Another Problem with GPO is, thart as soon as I add one or more smb.conf parameter ALL defaultsettings are in smb.conf. Then, because the parameter 'winbind separator' is not set the smb.conf is changed to: winbind separator = winbind use default domain = Yes only one line for both parameters. The testparm is giving me: ERROR: the 'winbind separator' parameter must be a single character.