This file is indexed.

/etc/logcheck/ignore.d.workstation/winbind is in logcheck-database 1.3.18.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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^\w{3} [ :0-9]{11} [._[:alnum:]-]+ pam_winbind\[[0-9]+\]: request failed: No such user, PAM error was [0-9]+, NT error was [_[:alpha:]]+$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ pam_winbind\[[0-9]+\]: user '[._[:alnum:]-]+' granted access$