That will NOT work. Wait until you get a certificate and try again. From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Patrick Sent: Monday, January 12, 2009 7:35 AM To: exchangelist@xxxxxxxxxxxxx; exchangelist@xxxxxxxxxxxxx; msexchange@xxxxxxxxxxxxx Subject: [ExchangeList] owa 2007 connection error Hi Guys, I have managed to install the new cert on our exchange 2007 server and isa 2006. However when we try to login we get the following error. * Error Code: 502 Proxy Error. Connection refused(10061) * IP Address: xxx.xx.xxx.x * Date: 12/01/2009 13:29:31 [GMT] * Server: Main-isa01 * Source: proxy Not quite sure what we are doing wrong. The thing is we are using the external ip address of the isa server to redirect to our exchange site until our isp makes the necessary dns change. so it is https://123.23.19.45/owa and then we get the above error. Thanks Patrick