Hi Guys,
I've taken a look at the Zimbra plugin and 5.0 and 5.0.1 don't seem to be supported, Only 4.5.
There are some changes in Zimbra like the file "zimbrastats.csv" has been changes to the file name "mailboxd.csv". The Hyperic plugin depends on this file, and hence won't fully work. [http://www.zimbra.com/forums/administrators/13661-zimbrastats-csv-missing.html]
Regards,
Roger