Question : How can a secure IMAP connection be set up between Exchange Server 2003 and Microsoft Outlook, Microsoft Enterouge (for Macinthosh) and cell phones ie IPhones, Windows mobile phones, and Blackberries

How can a secure IMAP connection be set up between Exchange Server 2003 and Microsoft Outlook, Microsoft Entourage (for Macintosh) and cell phones ie IPhones, Windows mobile phones, and Blackberries?

The client that I am working with has made it clear that the only solution that will work for them is Secure IMAP. They do not want to implement RPC over HTTPS in this case.

What methods do we have to make sure that the IMAP connections will always be secure?

Are we able to deploy certificates for IMAP, or are we only able to encrypt the IMAP connections and transmissions?

If all that we can do is to encrypt the IMAP connections, then exactly how are IMAP connections encrypted?

Please provide me with some hyperlinks that show exactly how this can be done.

Answer : How can a secure IMAP connection be set up between Exchange Server 2003 and Microsoft Outlook, Microsoft Enterouge (for Macinthosh) and cell phones ie IPhones, Windows mobile phones, and Blackberries

Just to follow-up with Simon's comment, you can install the SSL, configure it on the IMAP VS, then disable port 143 access from the Internet. Leave only 993 open, and it will prevent unencrypted IMAP access.

Howerver, RPC over HTTPS is definitely the way to go.