diff --git a/lib/web/auth/ldap/index.js b/lib/web/auth/ldap/index.js
index 766c5cbcc..9a63578aa 100644
--- a/lib/web/auth/ldap/index.js
+++ b/lib/web/auth/ldap/index.js
@@ -23,9 +23,10 @@ passport.use(new LDAPStrategy({
     tlsOptions: config.ldap.tlsOptions || null
   }
 }, function (user, done) {
+  var uuid = user.uidNumber || user.uid || user.sAMAccountName
   var profile = {
-    id: 'LDAP-' + user.uidNumber,
-    username: user.uid,
+    id: 'LDAP-' + uuid,
+    username: uuid,
     displayName: user.displayName,
     emails: user.mail ? [user.mail] : [],
     avatarUrl: null,