Hi: I use ADsGetObject function for the purpose of single signon. When I bind to Lotus Domino LDAP server which allow anonymous binding, the binding was success. However, even the binding is success, how do I determine if it is anonymous binding or not? Because according the MSDN: " if the authentication fails, the secure bind is downgraded to an anonymous bind, for example, a simple bind without any user credentials. ". Thanks in advance. mor2346@gmx.net