I'm not sure if this is a benefit or not (it is, from my perspective).. but it looks like as an added perk to the outlook connector, all those people that wanted to read their IMAP/POP mail in Zimbra can do so now.

It looks like the Outlook connector is pulling IMAP/POP accounts mail and storing them in the Zimbra Store -- so as long as outlook is running somewhere, you can then read all your mail from Zimbra anywhere else.

If this is true, its probably only a hop skip and a jump away from having this server side.