Using Zammad 6.3.1, I configured the LDAP integration as shown in https://admin-docs.zammad.org/en/latest/system/integrations/ldap/manage.html. During the configuration, the system has shown examples of extracted attributed correctly.
It worked for a while, resulting in:
LDAP user to Zammad user (66331):
Users: 0 created, 0 updated, 0 untouched, 66331 skipped, 0 failed, 0 deactivated
and in fact in the integration panel the LDAP source results Info: Sync cancelled. Ldap integration deactivated. Activate via the switch. and cannot be reactivated. There should be a configuration problem, but how can I figure it out?