IMAP Access - Can't access to EV IMAP server

Dear All,

The EV IMAP Endpoint has been enabled, but the MS outlook is not able to connect it from client side.

I see the port 993 is listening at EV server and I can telnet port 993 from client desktop to EV server.

Is there any hint for this connection troubleshooting?

The MS outlook error is "Log onto incoming mail server (IMAP): The connection to server failed"

I already assigned the username as "domain\username\evID"

Thanks.

Tony