diff --git a/Auth-Provider-Configuration.md b/Auth-Provider-Configuration.md
index 85af704..7c02d86 100644
--- a/Auth-Provider-Configuration.md
+++ b/Auth-Provider-Configuration.md
@@ -87,7 +87,7 @@ To use this provider you need to have a LDAP server set up and filled with users
   - `validate_hostname` - optional - Set the hostname for certificate validation, when unset the hostname from the `server` URI is used
   - `allow_insecure` - optional - Disable certificate validation. Setting this is not recommended for production setups
 
-When using the LDAP provider you need to pay attention when writing your ACL. As DNs are used as names for users and groups you also need to specify those in the ACL:
+When using the LDAP provider you need to pay attention when writing your ACL: The username reported to nginx will also be used to check the access. So if you're using the default (`username_attribute: dn`) you need to use those DN in your ACL:
 
 ```yaml
 acl: