apps/updatenotification/templates/enterprise.php
<form id="oca_updatenotification_section" class="section">
<h2 id="updater" class="app-name"><?php p($l->t('Updater')); ?></h2>
<?php print_unescaped($l->t('Online updater has been automatically disabled as you are currently running an ownCloud Enterprise edition. Please update your ownCloud instance manually.')) ?>
</form>