We are currently looking at Zimbra as an alternative to our current MDaemon installation. We have downloaded and installed the 60-day trial version.

I would like to migrate just a few users from MDaemon to Zimbra, to see how it performs in the areas where we are having problems with the former (very large mailboxes with lots of folders and/or working remotely). Is there any way I can share the domain between the MDaemon and Zimbra servers, so that I can move just a few users over and leave the others on MDaemon while I evaluate the performance?

This would probably be useful if we did decide to switch to Zimbra as well, so we could gradually move users over rather than having to do everyone all in one go.

Any ideas?