I STILL had to perform this procedure on my post-SP1 ISA/EXCH2K environment. Adding the below DWORD value should get you going... Brad Benz Voice/Data Integration Engineer CCNA, CCDA, CIPT, CUSE, MCSE inTouch Solutions 208.947.6786 208.378.0208 (fax) bbenz@xxxxxxxxxxxxxxxxxxx http://www.intouchsolutions.cc <http://www.intouchsolutions.cc/> -----Original Message----- From: David Dellanno [mailto:ddellanno@xxxxxxxxxxxxxxx] Sent: Wednesday, April 24, 2002 10:13 AM To: [ISAserver.org Discussion List] Subject: [isalist] OWA SSL: 500 Internal Server Error http://www.ISAserver.org http://www.ISAserver.org Hi everyone, I had a strange incident happen two days ago, where my OWA SSL Publishing Rule suddenly failed to work, "500 Internal Server error - The target principal name is incorrect" that was working for over 5 weeks. I did add IE Browser Security Update within the time frame of the incident. I was looking over this Q-Artile Q307347, that explains AddFrontEndHttpsHeader and this problem was corrected in ISA Server 2000 SP1. My Question, do I need to re-install ISA Server 2000 SP1 again? Can anyone help me verify that SP1 adds this entry to the registry with SP1? I do not have this DWORD in my ISA box am I running down the wrong rabbit hole? 1. Locate and click the following registry key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W3Proxy\Parameters 2. Create a new DWORD value that is named AddFrontEndHttpsHeader , and then give this new value a data value of 1. Thanks, Dave ------------------------------------------------------ You are currently subscribed to this ISAserver.org Discussion List as: bbenz@xxxxxxxxxxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub') ------------------------------------------------------ You are currently subscribed to this ISAserver.org Discussion List as: bbenz@xxxxxxxxxxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub')