diff --git a/pykolab/auth/ldap/__init__.py b/pykolab/auth/ldap/__init__.py
--- a/pykolab/auth/ldap/__init__.py
+++ b/pykolab/auth/ldap/__init__.py
@@ -2079,7 +2079,7 @@
                         entry[result_attribute]
                     )
 
-                if not self.imap.has_folder(imap_mailbox):
+                if not self.imap.user_mailbox_exists(imap_mailbox):
                     self.imap.user_mailbox_create(
                             entry[result_attribute]
                         )