Tom: I tried that before, no luck. I even wild open the ISA still not working. Therefore I want to create a specific protocol for that server. Thanks. BR/John H. -----Original Message----- From: Thomas W Shinder [mailto:tshinder@xxxxxxxxxxxxxxxxxx] Sent: Friday, March 07, 2003 2:22 PM To: [ISAserver.org Discussion List] Subject: [isalist] RE: client behind ISA access to remote Exchange behind another ISA using MAPI http://www.ISAserver.org Hi John, You definitely do NOT need the UUID to access the external Exchange Server. Just create the Protocol Rule. HTH, Tom Thomas W Shinder www.isaserver.org/shinder ISA Server and Beyond: http://tinyurl.com/1jq1 Configuring ISA Server: http://tinyurl.com/1llp