diff --git a/docker/roundcube/rootfs/opt/app-root/src/roundcubemail-config-templates/libkolab.inc.php b/docker/roundcube/rootfs/opt/app-root/src/roundcubemail-config-templates/libkolab.inc.php
index 76161ce8..c45cae71 100644
--- a/docker/roundcube/rootfs/opt/app-root/src/roundcubemail-config-templates/libkolab.inc.php
+++ b/docker/roundcube/rootfs/opt/app-root/src/roundcubemail-config-templates/libkolab.inc.php
@@ -1,16 +1,20 @@
 <?php
 
     $config['kolab_freebusy_server'] = '/freebusy';
 
     if (file_exists(RCUBE_CONFIG_DIR . '/' . ($_SERVER["HTTP_HOST"] ?? null) . '/' . basename(__FILE__))) {
         include_once(RCUBE_CONFIG_DIR . '/' . ($_SERVER["HTTP_HOST"] ?? null) . '/' . basename(__FILE__));
     }
 
     $config['kolab_cache'] = true;
 
+    if (getenv('KOLABOBJECTS_COMPAT_MODE') != "true") {
+        $config['kolab_dav_sharing'] = "sharing";
+    }
+
     $config['kolab_ssl_verify_host'] = false;
     $config['kolab_ssl_verify_peer'] = false;
 
     $config['kolab_use_subscriptions'] = true;
 
 ?>