Dear All I found the feature 'Native Windows Basic, Negotiate and NTLM Authenticators with NTLMv2 support' on Squid2.7 for Windows. But I explored but seldom share found to indicate how to implement this. In Linux Samba+Krb5 can make Squid talk with AD, but not sure if addtional packages need install to let Squid for Windows integrated with AD. Would you pls enlighten me, if can share some similar case and sample config will be very appreciated! Best Regards Tony Fei IMPORTANT NOTICE Email from OOCL is confidential and may be legally privileged. If it is not intended for you, please delete it immediately unread. The internet cannot guarantee that this communication is free of viruses, interception or interference and anyone who communicates with us by email is taken to accept the risks in doing so. Without limitation, OOCL and its affiliates accept no liability whatsoever and howsoever arising in connection with the use of this email. Under no circumstances shall this email constitute a binding agreement to carry or for provision of carriage services by OOCL, which is subject to the availability of carrier's equipment and vessels and the terms and conditions of OOCL's standard bill of lading which is also available at http://www.oocl.com.