I am using Windows XP and Windows Vista installed in my Computer. Also I have installed both Office 2003 and Office 2007. I also have Exchange 2003. Outlook Express and OWA is working fine. My Outlook is configured to connect by HTTPS. When users try to connect Outlook in window7 they are unable to connect. Our work is pending from past few days. Please tell me the appropriate solution. I am waiting for your reply.