Hello, I beg your pardon for my english... I want that my software can make an authentification with a directory LDAP. I have, at my disposal, the ADSI SDK with which I manages to make a simple navigator LDAP. I do not know the normal operation for the authentification with LDAP. But what I understands: - a directory LDAP can contains crypted passwords - my software can request LDAP to check the validity of a password. Is this well normal operation of the authentification with LDAP? Would you have a track on the tools ADSI which allow that? Thank you for your assistance, Julie.