server-tools/users_ldap_populate/views/users_ldap.xml

<?xml version="1.0"?>
<odoo>
    <record model="ir.ui.view" id="company_form_view">
        <field name="name">Add populate button to ldap view</field>
        <field name="model">base.config.settings</field>
        <field name="inherit_id" ref="auth_ldap.view_general_configuration_form_inherit_auth_ldap"/>
        <field name="arch" type="xml">
            <xpath name="populate_ldap" expr="//field[@name='ldaps']/form" position="inside">
                <group string="Populate user database">
                    <field name="deactivate_unknown_users"/>
                    <field name="no_deactivate_user_ids"
                           attrs="{'invisible': [('deactivate_unknown_users', '=', False)]}"
                           widget="many2many_tags" />
                </group>
                <button name="populate_wizard"
                        string="Populate"
                        type="object"
                        colspan="2"/>
            </xpath>
        </field>
    </record>
</odoo>