In LDAP auth plugin:

auth_plugin_ldap::sync_users($do_updates=true)

In DB auth plugin:

auth_plugin_db::sync_users(progress_trace $trace, $do_updates=false)

(the problem is inherited by other plugins, e.g. CAS, which extends one of that)

This situation limit refactoring possibilities, such as:

• it requires a specific scheduled task for each plugin instead of a generic one
• it prevents the  pull up of sync_users() as abstract method or parent method in the auth_plugin_base class
• it forces if/then clauses in external plugins which use the codebase of LDAP o DB one