Hi! I'm after a little help, I have 2x Windows 2008 servers, one which runs CAS only (Internet facing) and one which runs CAS, HT and MB. I also have Exchange 2003 servers in the domain aswell. If I connect to https://externalnameofserver.com/owa I can log into mailbox's on the 2007, as expected. If I connect to https://externalnameofserver.com/exchange I can log into mailbox's on 2003, as expected, but when I try and log into mailbox's on my exchange 2007 server, I get: 403 - Forbidden: Access is denied. You do not have permission to view this directory or page using the credentials that you supplied. Any Ideas what it could be, I been through a laod of docuements, and all say it shoudl just work, it is as if the the CAS server is not even trying to redirect the user to /owa Even if the backend mailbox server is offline, I still get the error above. Thanks, Rob

Hi, This might help: http://forums.microsoft.com/TechNet/ShowPost.aspx?PostID=3967143&SiteID=17 Leif

Hi, Please try to uncheck Require SSL option under Exchange in IIS on the internal CAS. Then restart IIS, and check this issue. Thanks Allen