diff --git a/pages/docs/configuration/authentication/ldap.mdx b/pages/docs/configuration/authentication/ldap.mdx
index ea6bc679..b5af9d8d 100644
--- a/pages/docs/configuration/authentication/ldap.mdx
+++ b/pages/docs/configuration/authentication/ldap.mdx
@@ -47,6 +47,12 @@ You can specify a mapping between the attributes of Librechat users and those of
       'By default, it uses givenName or mail.',
       'LDAP_USERNAME=givenName',
     ],
+    [
+      'LDAP_EMAIL',
+      'string',
+      'By default, it uses mail.',
+      'LDAP_EMAIL=userPrincipalName',
+    ],
     [
       'LDAP_FULL_NAME',
       'string',