diff --git a/plugins/kolab_activesync/kolab_activesync_ui.php b/plugins/kolab_activesync/kolab_activesync_ui.php
index 5200e4af..4b491ada 100644
--- a/plugins/kolab_activesync/kolab_activesync_ui.php
+++ b/plugins/kolab_activesync/kolab_activesync_ui.php
@@ -163,7 +163,7 @@ class kolab_activesync_ui
 
         $names = array();
         foreach ($a_folders as $folder) {
-            $foldername = $origname = preg_replace('/^INBOX »\s+/', '', kolab_storage::object_name($folder));
+            $foldername = $origname = preg_replace('/^INBOX »\s+/', '', kolab_storage::object_prettyname($folder));
 
             // find folder prefix to truncate (the same code as in kolab_addressbook plugin)
             for ($i = count($names)-1; $i >= 0; $i--) {
diff --git a/plugins/kolab_delegation/kolab_delegation.php b/plugins/kolab_delegation/kolab_delegation.php
index a9ccf464..85e670bb 100644
--- a/plugins/kolab_delegation/kolab_delegation.php
+++ b/plugins/kolab_delegation/kolab_delegation.php
@@ -530,7 +530,7 @@ class kolab_delegation extends rcube_plugin
 
         $names = array();
         foreach ($a_folders as $folder) {
-            $foldername = $origname = preg_replace('/^INBOX »\s+/', '', kolab_storage::object_name($folder));
+            $foldername = $origname = preg_replace('/^INBOX »\s+/', '', kolab_storage::object_prettyname($folder));
 
             // find folder prefix to truncate (the same code as in kolab_addressbook plugin)
             for ($i = count($names)-1; $i >= 0; $i--) {