SonataUserBundle/Resources/config/admin_orm.xml

<?xml version="1.0" encoding="UTF-8" ?>
<container xmlns="http://symfony.com/schema/dic/services"
           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd">

    <parameters>
        <!-- USER -->
        <parameter key="sonata.user.admin.user.class">Sonata\UserBundle\Admin\Entity\UserAdmin</parameter>
        <parameter key="sonata.user.admin.user.controller"></parameter>
        <parameter key="sonata.user.admin.user.entity">Application\Sonata\UserBundle\Entity\User</parameter>
        <parameter key="sonata.user.admin.user.translation_domain">SonataUserBundle</parameter>

        <!-- GROUP -->
        <parameter key="sonata.user.admin.group.class">Sonata\UserBundle\Admin\Entity\GroupAdmin</parameter>
        <parameter key="sonata.user.admin.group.controller"></parameter>
        <parameter key="sonata.user.admin.group.entity">Application\Sonata\UserBundle\Entity\Group</parameter>
        <parameter key="sonata.user.admin.group.translation_domain">%sonata.user.admin.user.translation_domain%</parameter>

        <parameter key="sonata.user.admin.groupname">sonata_user</parameter>
    </parameters>

    <services>
        <service id="sonata.user.admin.user" class="%sonata.user.admin.user.class%">
            <tag name="sonata.admin" manager_type="orm" group="%sonata.user.admin.groupname%" label="users" />
            <argument />
            <argument>%sonata.user.admin.user.entity%</argument>
            <argument />
            <call method="setUserManager">
                <argument type="service" id="fos_user.user_manager" />
            </call>
            <call method="setTranslationDomain">
                <argument>%sonata.user.admin.user.translation_domain%</argument>
            </call>
        </service>

        <service id="sonata.user.admin.group" class="%sonata.user.admin.group.class%">
            <tag name="sonata.admin" manager_type="orm" group="%sonata.user.admin.groupname%" label="groups" />
            <argument />
            <argument>%sonata.user.admin.group.entity%</argument>
            <argument />
            <call method="setTranslationDomain">
                <argument>%sonata.user.admin.group.translation_domain%</argument>
            </call>
        </service>
    </services>

</container>