Hi all, I have an Exch 5.5 + OWA in a DMZ. My users have been reporting that they cannot get through OWA when they're on someone else's LAN. Further investigation showed that these users were connecting through a proxy. The problem is that after they enter their alias and click the hyperlink, the authentication box does not pop up, but instead the client's browser goes blank. The the proxy (the one the client is connecting through) reports an 'Authentication Failed' error. What's going on? Any idea how we can solve this? Thanks and regards Mr. Andrea Coppini +356 79 ANDREA (263732) andreacoppini@xxxxxxxx EMPOWER PEOPLE - THE WORLD IN YOUR HAND! iWG (iWORLD Group) is a global e-mobile(TM) company creating, building and growing new businesses. iWG founders are pioneers in creating multi-billion dollar mobile and Internet businesses in Europe, Asia and the US. The Global Partners include shareholders like Bank of America, Deutsche Bank, Hikari Tsushin, McCaw, PaineWebber/UBS, The Dolphins' Trust, Perikles Trust and the iAA Advisory Network. http://www.iWG.info http://www.countryprofiler.com/Malta/ Privileged/Confidential Information may be contained in this message. If you are not the addressee indicated in this message (or responsible for delivery of the message to such person), you may not copy or deliver this message to anyone. In such case, you should destroy this message and kindly notify the sender by reply email.