Remote outbound connection with authentication-context cannot be used for remote EJB calls

<outbound-socket-binding name="remote-ejb">
   <remote-destination host="${remote.ejb.host}" port="8080"/>
</outbound-socket-binding>
(...)
<remote-outbound-connection name="remote-ejb-connection" outbound-socket-binding-ref="remote-ejb" authentication-context="admin-ctx"/>
(...)
<authentication-client>
    <authentication-configuration name="admin-cfg" authentication-name="admin" realm="ApplicationRealm" allow-sasl-mechanisms="DIGEST-MD5">
        <credential-reference clear-text="admin123+"/>
    </authentication-configuration>
    <authentication-context name="admin-ctx">
       <match-rule authentication-configuration="admin-cfg"/>
    </authentication-context>
</authentication-client>