diff --git a/src/externalldap.js b/src/externalldap.js
index 7bba0db2f..233b06158 100644
--- a/src/externalldap.js
+++ b/src/externalldap.js
@@ -192,11 +192,15 @@ function sync(progressCallback, callback) {
                             }
 
                             if (error) {
+                                debug('[adding user]', user.uid, user.mail, user.cn);
+
                                 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);
                                     callback();
                                 });
                             } else if (result.email !== user.mail || result.displayName !== user.cn) {
+                                debug('[updating user]', user.uid, user.mail, 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);
                                     callback();