I have installed Zimbra Desktop 2.0 beta 1 on both my desktop and laptop.

Setting up accounts on my laptop all of my accounts validated. However, setting up the same accounts on my desktop my Microsoft Exchange IMAP account will not validate. I get the error "service.FAILURE: system failure: SMTP connect failure". This is a simple setup without SSL so seems strange that on one computer validation is OK, but on the other it is not.

Is there some magic that I am missing?