In my lab, I have one Exchange 2003 server and two Exchange 2007 servers (one with hub,mailbox and CAS roles and one with CAS only) I have installed a self-signed cert form our CA on the CAS only server and enabled it for IIS. Now, when I go to https://owa.dol.ks.gov I don't get an untrusted cert error. However, when I use the 2003 OWA link at https://mail.mydomain.com and attempt to logon with a user account whose mailbox is on the 2007 server, I once again get the untrusted cert error. When I click on 'Continue to Website' I am redirected to the 2007 OWA logon. I need to rid of that error. BTW, is the redirect working as designed as far as redirecting the 2007 user to the 2007 OWA logon. Is there anyway, the redirect would take the 2007 user right into their mailbox? I've noticed different behavior between XP and Vista. On XP when I use the 2003 OWA link and attempt to logon as a user whose mailbox is on 2007, I get the cert error , but when I proceed I am prompted for credentials to logon to the mailbox server, which is also one of the CAS servers. Could that be the problem, it is trying to authenticate at the mailboox server where thereis is still the original cert from the Exchange installation? Thanks

Sorry, I posted an error. The error I get is not an untrusted site error, but a mismatched address error.Thanks

Hi,Please understand that the OWAlink on the Exchange 2003 must has the matching name of certificate in IIS. After transparent redirecting to the 2007, the self-signed certificate on the CAS will be used.ThanksAllen