diff --git a/src/externalldap.js b/src/externalldap.js
index d8e0fc989..191a76067 100644
--- a/src/externalldap.js
+++ b/src/externalldap.js
@@ -184,11 +184,11 @@ function sync(progressCallback, callback) {
                         if (error && error.reason !== UserError.NOT_FOUND) return console.error(error);
 
                         if (error) {
-                            users.create(user.uid, null, user.mail, user.displayName, { source: 'ldap' }, auditsource.EXTERNAL_LDAP_TASK, function (error) {
+                            users.create(user.uid, null, user.mail, user.cn, { source: 'ldap' }, auditsource.EXTERNAL_LDAP_TASK, function (error) {
                                 if (error) console.error('Failed to create user', user, error);
                             });
-                        } else if (result.email !== user.mail || result.displayName !== user.displayName) {
-                            users.update(result.id, { email: user.mail, displayName: user.displayName }, auditsource.EXTERNAL_LDAP_TASK, function (error) {
+                        } else if (result.email !== user.mail || result.displayName !== user.cn) {
+                            users.update(result.id, { email: user.mail, displayName: user.cn }, auditsource.EXTERNAL_LDAP_TASK, function (error) {
                                 if (error) console.error('Failed to update user', user, error);
                             });
                         } else {