HI I am mid way through swing migration of exchange 2003 and not all of my users have been moved across to the new server. There is a small portion of my users who use IMAP4 clients to view their email. At present this service is running on my old server and I would like to implement it on the new server. Would there be any issues having IMAP4 services running on two exchange servers? Also can i use the same certificate for communication that I am using for web mail?