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Shouldn't this PR target a lower branch, eg 4.4?
Can this be tested somehow?

Here the snippents from my config. Without the modification the memberOf will fail.

It took me half a day of researching because the documentation is missing the service tag for the ldap service.

# /config/packages/security.yamlsecurity:enable_authenticator_manager:trueproviders:provider_ldap:ldap:service:Symfony\Component\Ldap\Ldapbase_dn:dc=planetexpress,dc=comsearch_dn:cn=admin,dc=planetexpress,dc=comsearch_password:GoodNewsEveryonedefault_roles:ROLE_USERuid_key:uidextra_fields:['givenName','sn','mail','memberOf']firewalls:dev:pattern:^/(_(profiler|wdt)|css|images|js)/security:falsemain:lazy:trueform_login_ldap:service:Symfony\Component\Ldap\Ldapenable_csrf:truelogin_path:logincheck_path:logindn_string:dc=planetexpress,dc=comquery_string:'(&(uid={username}))'search_dn:cn=admin,dc=planetexpress,dc=comsearch_password:GoodNewsEveryonelogout:path:logoutaccess_control:        -{ path: ^/login, roles: IS_ANONYMOUS }        -{ path: ^/, roles: ROLE_USER }

# /config/services.yamlservices:Symfony\Component\Ldap\Ldap:arguments:['@Symfony\Component\Ldap\Adapter\ExtLdap\Adapter']# the documentation is missing the service tagtags:['ldap']Symfony\Component\Ldap\Adapter\ExtLdap\Adapter:arguments:            -host:localhostport:10386#encryption: tlsoptions:protocol_version:3referrals:false

This should target 🎯 4.4 and can you please add a testcase to avoid further regression?

Thank you@mr-sven.